Kludge: work around lack of syscall.seek on 386 and arm, #1906

Revert this once syscall.seek is implemented
cf. https://github.com/tinygo-org/tinygo/issues/1906

src/os/seek_unix_bad.go

@@ -0,0 +1,31 @@
+// +build linux,!baremetal,386 linux,!baremetal,arm,!wasi
+
+// Functions broken by lack of seek().
+// Stat is broken because it uses Time, which has a preadn function that uses seek :-(
+//
+// TODO: remove this file once tinygo gets syscall.Seek support on i386
+
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package os
+
+// Seek sets the offset for the next Read or Write on file to offset, interpreted
+// according to whence: 0 means relative to the origin of the file, 1 means
+// relative to the current offset, and 2 means relative to the end.
+// It returns the new offset and an error, if any.
+// The behavior of Seek on a file opened with O_APPEND is not specified.
+//
+// If f is a directory, the behavior of Seek varies by operating
+// system; you can seek to the beginning of the directory on Unix-like
+// operating systems, but not on Windows.
+func (f *File) Seek(offset int64, whence int) (ret int64, err error) {
+	return f.handle.Seek(offset, whence)
+}
+
+// Stat returns the FileInfo structure describing file.
+// If there is an error, it will be of type *PathError.
+func (f *File) Stat() (FileInfo, error) {
+	return nil, &PathError{Op: "fstat", Path: f.name, Err: ErrNotImplemented}
+}