GNUmakefile: update stdlib test package lists

Add newly passing packages to the appropriate native and Windows
standard-library test lists, and refresh comments for packages that
remain disabled.

GNUmakefile

@@ -385,22 +385,22 @@ TEST_PACKAGES_FAST = \
 # archive/zip requires os.ReadAt, which is not yet supported on windows
 # bytes requires mmap
 # compress/flate appears to hang on wasi
-# crypto/aes fails on wasi, needs panic()/recover()
+# crypto/aes needs reflect.Type.Method(), not yet implemented
 # 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/xml takes a minute on linux and gives a stack overflow on wasi
-# image requires recover(), which is not yet supported on wasi
+# image fails on wasi, needs panic()/recover()
 # io/ioutil requires os.ReadDir, which is not yet supported on windows or wasi
-# mime: fail on wasi; neds panic()/recover()
+# mime: fails on wasi, needs panic()/recover()
 # mime/multipart: needs wasip1 syscall.FDFLAG_NONBLOCK
 # mime/quotedprintable requires syscall.Faccessat
 # net/mail: needs wasip1  syscall.FDFLAG_NONBLOCK
 # net/ntextproto: needs wasip1 syscall.FDFLAG_NONBLOCK
-# regexp/syntax: fails on wasip1; needs panic()/recover()
-# strconv requires recover() which is not yet supported on wasi
-# text/tabwriter requires recover(), which is not yet supported on wasi
-# text/template/parse requires recover(), which is not yet supported on wasi
+# regexp/syntax: fails on wasip1, needs panic()/recover()
+# strconv: fails on wasi, needs panic()/recover()
+# text/tabwriter: fails on wasi, needs panic()/recover()
+# text/template/parse: fails on wasi, needs panic()/recover()
 # testing/fstest requires os.ReadDir, which is not yet supported on windows or wasi
 
 # Additional standard library packages that pass tests on individual platforms
@@ -425,6 +425,7 @@ TEST_PACKAGES_LINUX := \
 	os/user \
 	regexp/syntax \
 	strconv \
+	testing/fstest \
 	text/tabwriter \
 	text/template/parse
 
@@ -435,7 +436,11 @@ TEST_PACKAGES_WINDOWS := \
 	compress/flate \
 	crypto/des \
 	crypto/hmac \
+	image \
+	mime \
+	regexp/syntax \
 	strconv \
+	text/tabwriter \
 	text/template/parse \
 	$(nil)