Merge experimental/a64 to bleeding_edge.

test/preparser/preparser.status

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+
+# We don't parse RegExps at scanning time, so we can't fail on octal
+# escapes (we need to parse to distinguish octal escapes from valid
+# back-references).
 [
 [ALWAYS, {
   # TODO(mstarzinger): This script parses but throws a TypeError when run.
   'non-alphanum': [FAIL],
 
   # We don't parse RegExps at scanning time, so we can't fail on octal
   # escapes (we need to parse to distinguish octal escapes from valid
   # back-references).
   'strict-octal-regexp': [FAIL],
 }],  # ALWAYS
 
 ['arch == android_arm or arch == android_ia32', {
   # Remove this once the issue above is fixed. Android test runner does not
   # handle "FAIL" test expectation correctly.
   'strict-octal-regexp': [SKIP],
 }],  # 'arch == android_arm or arch == android_ia32'
 ]