Specify the name of tool for creating a makefile.

When generating tool Android.mks from gyp files, specify the name
of the target needed.

This fixes a bug where nanobench was being added to the same
makefile as bench, which would not compile.

TODO: Make gyp_to_android more general, so that it handles this
case better. See http://skbug.com/2709

R=mtklein@google.com

Author: scroggo@google.com

Review URL: https://codereview.chromium.org/366653002
2 files changed