test: skip asn1 nesting-limit tests, and BoundarySlices crypto tests

Address review feedback on #5593.

Instead of dropping encoding/asn1 entirely, keep the package and skip only
TestUnmarshalNestingLimitSlice/Struct, which fail due to the nesting limit
added in golang/go@6a6d115f9a.

Since Go 1.27 the crypto hash tests go through cryptotest.TestHash, which
calls cryptotest.BoundarySlices. Targets reporting GOOS=linux build
boundary.go (//go:build linux || darwin) instead of boundary_compat.go, and
that needs a working syscall.Mmap/syscall.Mprotect:

  * baremetal fails to compile: undefined: syscall.Mprotect
  * wasip2 gets ENOSYS from syscall.Mmap, and since t.Fatalf cannot Goexit on
    wasm the test falls through and panics with "slice out of range"

Exclude crypto/md5, crypto/sha1, crypto/sha256 and crypto/sha512 from both.
wasip1 reports GOOS=wasip1, gets the boundary_compat.go fallback, and keeps
testing all four.

Signed-off-by: deadprogram <ron@hybridgroup.com>

GNUmakefile

@@ -349,6 +349,7 @@ TEST_PACKAGES_FAST = \
 	encoding \
 	encoding/ascii85 \
 	errors \
+	encoding/asn1 \
 	encoding/base32 \
 	encoding/base64 \
 	encoding/csv \
@@ -391,7 +392,6 @@ TEST_PACKAGES_FAST = \
 # crypto/des fails on wasi, needs panic()/recover()
 # crypto/hmac fails on wasi, it exits with a "slice out of range" panic
 # debug/plan9obj requires os.ReadAt, which is not yet supported on windows
-# encoding/asn1 due to https://github.com/golang/go/commit/6a6d115f9a7422b2fa081ba6f567eefb4a099462 
 # encoding/xml takes a minute on linux and gives a stack overflow on wasi
 # image fails on wasi, needs panic()/recover()
 # io/ioutil requires os.ReadDir, which is not yet supported on windows or wasi
@@ -473,9 +473,15 @@ TEST_PACKAGES_NONWASM = \
 #     (just like wasm).
 #   * picolibc math functions apparently are less precise, the math package
 #     fails on baremetal.
+#   * Since Go 1.27 the crypto tests below go through cryptotest.TestHash, which
+#     calls cryptotest.BoundarySlices. These targets report GOOS=linux, so they
+#     build boundary.go (//go:build linux || darwin) rather than
+#     boundary_compat.go, and that needs a working syscall.Mmap/syscall.Mprotect
+#     which we don't have. See #5593.
 TEST_PACKAGES_BAREMETAL = $(filter-out $(TEST_PACKAGES_NONBAREMETAL), $(TEST_PACKAGES_FAST))
 TEST_PACKAGES_NONBAREMETAL = \
 	$(TEST_PACKAGES_NONWASM) \
+	$(TEST_PACKAGES_NOBOUNDARYSLICES) \
 	math \
 	$(nil)
 
@@ -484,6 +490,19 @@ TEST_PACKAGES_NOWASI = \
 	crypto/ecdsa \
 	$(nil)
 
+# wasip1 reports GOOS=wasip1 and so gets the boundary_compat.go fallback, but
+# wasip2 reports GOOS=linux and hits the same BoundarySlices problem as
+# baremetal. On wasip2 syscall.Mmap returns ENOSYS and t.Fatalf cannot Goexit,
+# so the test falls through and panics with "slice out of range".
+TEST_PACKAGES_FAST_WASIP2 = $(filter-out $(TEST_PACKAGES_NOBOUNDARYSLICES), $(TEST_PACKAGES_FAST_WASI))
+
+TEST_PACKAGES_NOBOUNDARYSLICES = \
+	crypto/md5 \
+	crypto/sha1 \
+	crypto/sha256 \
+	crypto/sha512 \
+	$(nil)
+
 # Report platforms on which each standard library package is known to pass tests
 report-stdlib-tests-pass:
 	$(eval jointmp := $(shell echo /tmp/join.$$$$))
@@ -510,7 +529,7 @@ TEST_PACKAGES_HOST := $(TEST_PACKAGES_FAST) $(TEST_PACKAGES_WINDOWS)
 TEST_IOFS := false
 endif
 
-TEST_SKIP_FLAG := -skip='TestExtraMethods|TestParseAndBytesRoundTrip/P256/Generic|TestAsValidation'
+TEST_SKIP_FLAG := -skip='TestExtraMethods|TestParseAndBytesRoundTrip/P256/Generic|TestAsValidation|TestUnmarshalNestingLimitSlice|TestUnmarshalNestingLimitStruct'
 TEST_ADDITIONAL_FLAGS ?=
 
 # Test known-working standard library packages.
@@ -519,6 +538,8 @@ TEST_ADDITIONAL_FLAGS ?=
 tinygo-test:
 	@# TestExtraMethods: used by many crypto packages and uses reflect.Type.Method which is not implemented.
 	@# TestParseAndBytesRoundTrip/P256/Generic: needs Goexit to run defers on wasm.
+	@# TestUnmarshalNestingLimit{Slice,Struct}: encoding/asn1 nesting limit added in
+	@# https://github.com/golang/go/commit/6a6d115f9a7422b2fa081ba6f567eefb4a099462
 	$(TINYGO) test $(TEST_ADDITIONAL_FLAGS) $(TEST_SKIP_FLAG) $(filter-out encoding/xml,$(TEST_PACKAGES_HOST)) $(TEST_PACKAGES_SLOW)
 ifeq ($(TEST_ENCODING_XML),true)
 	$(TINYGO) test $(TEST_ADDITIONAL_FLAGS) $(TEST_SKIP_FLAG) -stack-size=16MB encoding/xml
@@ -549,7 +570,7 @@ tinygo-test-wasip1-fast:
 tinygo-test-wasip2-slow:
 	$(TINYGO) test -target=wasip2 $(TEST_SKIP_FLAG) $(TEST_PACKAGES_SLOW)
 tinygo-test-wasip2-fast:
-	$(TINYGO) test -target=wasip2 $(TEST_SKIP_FLAG) $(TEST_PACKAGES_FAST_WASI) ./tests/runtime_wasi
+	$(TINYGO) test -target=wasip2 $(TEST_SKIP_FLAG) $(TEST_PACKAGES_FAST_WASIP2) ./tests/runtime_wasi
 
 tinygo-test-wasip2-sum-slow:
 	TINYGO=$(TINYGO) \