Remove -r option from dump_syms invocation on Linux

The -r option was originally added and used to attempt to avoid address
space exhaustion on 32 bit builders. It appears to be causing missing
function names in stack traces (see https://crbug.com/670533). Since we
no longer build on 32 bit anyway, remove the option.

R=mark@chromium.org
BUG=670533,230995

Review-Url: https://codereview.chromium.org/2563663003
Cr-Original-Commit-Position: refs/heads/master@{#437277}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: fc57756e6a469a6f2df99a0b9cd0dd40f9f6b8f4

linux/dump_app_syms.py

@@ -23,7 +23,7 @@ outfile = sys.argv[4]
 if not os.path.isfile(outfile) or \
    os.stat(outfile).st_mtime > os.stat(infile).st_mtime:
   with open(outfile, 'w') as outfileobj:
-    subprocess.check_call([dumpsyms, '-r', infile], stdout=outfileobj)
+    subprocess.check_call([dumpsyms, infile], stdout=outfileobj)
 
 if strip_binary != '0':
   subprocess.check_call(['strip', infile])