Merged r15395, r15396, r15397 into trunk branch.

MIPS: Hydrogen array constructor cleanup and improvements.

MIPS: Improved function entry hook coverage.

MIPS: Fix wrong checkin.

R=jkummerow@chromium.org
BUG=

Review URL: https://codereview.chromium.org/18177014

git-svn-id: https://v8.googlecode.com/svn/trunk@15399 ce2b1a6d-e550-0410-aec6-3dcde31c8c00