Log Message:
Updated devel/pkg-config to 0.29.2
----------------------------------
pkg-config 0.29.2
=================

- Improved pkg-config's recursive package list expansion performance.
  Thanks to Matthew Hanna for the fix.
- Handle an empty prefix setting correctly when --define-prefix is used.
  (#97453)
- Lazily load pc files instead of reading all available pc files during
  initialization. Thanks to Marco Diego Aurélio Mesquita for the fix.
  (#98215)
- Check the CPATH environment variable when determining system include
  paths like GCC does. Document the system search path behavior. Thanks
  to v4hn for the fix. (#99224)
- Make PKG_CHECK_MODULES show the module list rather than the variable
  prefix in configure output. Thanks to Russ Albery for the fix.
  (#98334)
- Fix bundled glib build with GCC 6. (#98334)
- Handle -isystem and -idirafter when PKG_CONFIG_SYSROOT_DIR is set.
  (#97337)
- Check the INCLUDE environment variable when determining system include
  paths on Windows builds when --msvc-syntax is used. (#94729)