MIPS32: Add direct calls to math intrinsics.

MIPS32: Add direct calls to math intrinsics.

- cos       - sin       - acos      - asin
- atan      - atan2     - cbrt      - cosh
- exp       - expm1     - hypot     - log
- log10     - nextAfter - sinh      - tan
- tanh

Test: run-test --no-prebuild --optimizing 123-inline-execute2
Test: run-test --no-prebuild 123-inline-execute2
Test: run-test --optimizing 123-inline-execute2
Test: run-test 123-inline-execute2
Test: Booted MIPS32R2 and MIPS64R6 emulators.

Note: Ran tests under both emulators, and on CI20 hardware.

Change-Id: I4c1782d609a985ae49737f47c43caa5b0b6a10e3