Add mips64 port.

Summary:

- Changes in common code are mainly boilerplate changes,
gyp and test status files updates.

- On mips64 simulator all tests pass from all test units.

- Current issues: mjsunit JS debugger tests fail randomly on HW in release mode.
Corresponding tests are skipped on HW.

- Skipped tests on mips64: test-heap/ReleaseOverReservedPages, mjsunit/debug-*

TEST=
BUG=
R=danno@chromium.org, plind44@gmail.com, ulan@chromium.org

Review URL: https://codereview.chromium.org/371923006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22297 ce2b1a6d-e550-0410-aec6-3dcde31c8c00