add make-c to measure time to parse android makefiles.

% time ./repo/android.sh make-c.sh > /tmp/make.log
./repo/android.sh make-c.sh > /tmp/make.log  24.43s user 11.21s system 101% cpu 35.116 total

% tail -1 /tmp/make.log
make -c: 34.680252934s

% time ./repo/android.sh kati -c -find_cache_prunes=".git .repo out" > /tmp/kati.log
fatal: Not a git repository: 'packages/apps/Camera2/.git'
./repo/android.sh kati -c -find_cache_prunes=".git .repo out" > /tmp/kati.log  35.68s user 17.44s system 177% cpu 29.982 total
2 files changed