SkSplicer: move armv7 ABI settings into build_stages.py.

This just tidies up the .cpp files a bit, and makes it easier to make
sure all exported functions use the aapcs-vfp callig convention, which
hard-float implies.

As a small simplification, fold -march=armv7-a into --target.

No generated code changes.

Change-Id: I2694970a6e48bd69c41dd280a44ddd0029e52ae8
Reviewed-on: https://skia-review.googlesource.com/7371
Commit-Queue: Mike Klein <mtklein@chromium.org>
Reviewed-by: Mike Klein <mtklein@chromium.org>
3 files changed