Log Message:
Update to 0.9.12.20151208.

This is a manually created snapshot to get a bug fix while waiting
for the next release since the diff would be too big.

Changes from 0.9.12:
--------------------

* Features:
  - new library: libpkgconf

* Enhancements:
  - testsuite: use an explicit prefix on all tests
  - build: switch to automake

* Bug fixes:
  - cast all usage of ctype(3) functions
  - do not expand variables passed via --define-variable for compatibility with \ 
pkg-config 0.29
  - let the CFLAGS being user settable