Fix ContextDeathTest.X86BadFlags unit test on Mac OS X.
Fix ContextDeathTest.X86BadFlags unit test on Mac OS X.

The assertion (context.context_flags & MD_CONTEXT_X86) in synth_minidump.cc
produces a different message on Mac OS X than other platforms. This patch
changes the ContextDeathTest.X86BadFlags test to handle both message patterns.

BUG=424
TEST=Verified ContextDeathTest.X86BadFlags on Windows, Linux and Mac OS X.
Review URL: http://breakpad.appspot.com/333001

git-svn-id: 7939527bf0a06ad24ad020f729d5600cb42ed5d7@894 4c0a9323-5329-0410-9bdc-e9ce6186880e

bittorrent/breakpad,wesen/google-breakpad,bittorrent/breakpad,wesen/google-breakpad,wesen/google-breakpad,bittorrent/breakpad,bittorrent/breakpad,bittorrent/breakpad,wesen/google-breakpad,wesen/google-breakpad,bittorrent/breakpad,wesen/google-breakpad,bittorrent/breakpad