MIPS: Improve --rpath and --dynamic-linker handling in gyp.
MIPS: Improve --rpath and --dynamic-linker handling in gyp.

BUG=

Review URL: https://codereview.chromium.org/1160973006

Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#28842}

UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh,UniversalFuture/moosh