[MIPS] Fix core dump related unit tests for Android on MIPS

This change fixes failing unittests in Android on MIPS:
LinuxCoreDumperTest.VerifyDumpWithMultipleThreads
ElfCoreDumpTest.ValidCoreFile

BUG=None
TEST=Running breakpad_unittests on MIPS Android device

Review URL: https://breakpad.appspot.com/3664002



git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1330 4c0a9323-5329-0410-9bdc-e9ce6186880e
Fix x86_64 Android build after user_fpregs_struct was added to /sys/user.h in newer NDKs

BUG=346626
TBR=mark@chromium.org

Review URL: https://breakpad.appspot.com/2694002

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1331 4c0a9323-5329-0410-9bdc-e9ce6186880e
Fix minor typo in a comment in r1331.

R=qsr@google.com

Review URL: https://breakpad.appspot.com/3674002

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1332 4c0a9323-5329-0410-9bdc-e9ce6186880e