Intrinsics in the INLINE_FUNCTION_LIST are now avaliable without '_', too.

Intrinsics in the INLINE_FUNCTION_LIST are now avaliable without '_', too.

This involved renaming apart a few more intrinsics. In the long run,
we want to clean up redundant intrinsics which just delegate.

BUG=v8:3947
LOG=n

Review URL: https://codereview.chromium.org/984963002

Cr-Commit-Position: refs/heads/master@{#27043}