Add mips dsp arch variants to gyp_to_android.py.

Fixes Android  build for variants mips32r2dsp-fp and mips32r2dspr2-fp by
enabling correct Android.mk file generation.

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2359793002

Review-Url: https://codereview.chromium.org/2359793002
4 files changed