[HWASan] deflake hwasan_symbolize test

[fmayer]

Summary

Also enable on X86_64.

The directory would change during the test execution. This should not
necessarily prevent us from indexing a directory (a user might
potentially do that if they specify a parent directory of the actual
symbols directory, and change unrelated files).

[fmayer]

style

[eugenis]

LGTM

compiler-rt/lib/hwasan/scripts/hwasan_symbolize

else:
         html.escape(link.format(file=filename[len(prefix):], line=line,
                                 file_line=file_line, prefix=prefix)), file_line)
 
   def build_index(self):
     for p in self.__binary_prefixes:
       for dname, _, fnames in os.walk(p):
         for fn in fnames:
           filename = os.path.join(dname, fn)
+          try:
             bid = get_buildid(filename)
+          except FileNotFoundError:
+            continue
           if bid is not None:
             self.__index[bid] = filename
 
   def symbolize_line(self, line):
     #0 0x7f6e35cf2e45  (/blah/foo.so+0x11fe45) (BuildId: 4abce4cd41ea5c2f34753297b7e774d9)
     match = re.match(r'^(.*?)#([0-9]+)( *)(0x[0-9a-f]*) *\((.*)\+(0x[0-9a-f]+)\)'
                     r'(?:\s*\(BuildId: ([0-9a-f]+)\))?', line, re.UNICODE)
     if match:

compiler-rt/test/hwasan/TestCases/hwasan_symbolize.cpp

 // RUN: %clang_hwasan -Wl,--build-id -g %s -o %t
 // RUN: echo '[{"prefix": "'"$(realpath $(dirname %s))"'/", "link": "http://test.invalid/{file}:{line}"}]' > %t.linkify
 // RUN: %env_hwasan_opts=symbolize=0 not %run %t 2>&1 | hwasan_symbolize --html --symbols $(dirname %t) --index | FileCheck %s
 // RUN: %env_hwasan_opts=symbolize=0 not %run %t 2>&1 | hwasan_symbolize --html --linkify %t.linkify --symbols $(dirname %t) --index | FileCheck --check-prefixes=CHECK,LINKIFY %s
 // RUN: %env_hwasan_opts=symbolize=0 not %run %t 2>&1 | hwasan_symbolize --symbols $(dirname %t) --index | FileCheck %s
 
-// There are currently unrelated problems on x86_64, so skipping for now.
-// REQUIRES: android
 // REQUIRES: stable-runtime
 
 #include <sanitizer/hwasan_interface.h>
 #include <stdlib.h>
 
 static volatile char sink;
 
 int main(int argc, char **argv) {