Have pathkit use libpathkit.a for faster builds

Of note, it is very important for the -DSK_RELEASE/-DSK_DEBUG
to match between libskia.a and the WASM bindings, otherwise
things like SKDEBUGCODE are sometimes compiled in and sometimes
not, which can cause headaches like sizeof() mismatching between
.cpp files and .h files.

Bug: skia:
Change-Id: Id6ef58c44a7c10014a243b36708e0891514f6008
Reviewed-on: https://skia-review.googlesource.com/158341
Reviewed-by: Mike Klein <mtklein@google.com>
8 files changed