MIPS: Fix crashes after profile entry hook calls.

The call to C++ function has to be done through t9 register for
the position independent code.

The crashes occur only for shared library build.

TEST=cctest/test-api/SetFunctionEntryHook
BUG=
R=plind44@gmail.com

Review URL: https://codereview.chromium.org/132113009

Patch from Dusan Milosavljevic <Dusan.Milosavljevic@rt-rk.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@19121 ce2b1a6d-e550-0410-aec6-3dcde31c8c00