pkg-config: add a wrapper for it

We need to tell pkg-config where to find its .pc files, so add a wrapper
to dynamically locate the sysroot and various inputs.

BUG=24775992
TEST=building pax-utils (which uses pkg-config) works now

Change-Id: I6ad54e8521649422f43e72105c6b135043c99c0b
5 files changed
tree: 4edf182e2b3ee75129088e278eff52552acf3415
  1. 3rd-party-binary.mk
  2. Android.mk
  3. NOTICE
  4. TODO
  5. portage/
  6. tests/
  7. toolchain/