Log Message:
Update to 0.29. Regen patches.

pkg-config 0.29
===

- Fixed a regression from 0.28 in system -L flag handling. If the pc
  file has multiple system -L flags, every other flag will be left as
  is. Thanks to Andrew Oakley for the fix. (#78077)
- Quoting of variables queried through --variable is removed so that the
  output can be used verbatim in subsequent shell commands. Thanks to
  Marek Kasik for the fix. (#67904)
- Fixed a regression from 0.28 in -L flag handling on Windows. A .libs
  suffix was inadvertantly being added to the library path.
- Added a --validate option to check pc file syntax. This works just
  like --exists, but package dependencies are disabled. (#7000)
- Added the PKG_PREREQ autoconf macro. Whereas PKG_PROG_PKG_CONFIG is
  used to check the version of the pkg-config tool, this is used to
  check the version of the pkg-config autoconf macros in use.
- Added the PKG_CHECK_MODULES_STATIC autoconf macro. This will
  temporarily add --static to the pkg-config calls while invoking
  PKG_CHECK_MODULES. (#19541)
- Many fixes to the testsuite for Windows. It should now pass for a
  MinGW, Cygwin, and cross-compiled MinGW using Wine for test execution.
  (#66939)
- More consistent handling of prefix redefinition. On Windows, the
  prefix was always being redefined based on the pc file path. This
  feature can now be enabled or disabled at runtime on all platforms
  using the --define-prefix and --dont-define-prefix options. (#63602)
- Continue listing packages with --list-all even if there are errors in
  pc files. (#26615)
- Various documentation improvements. (#62018, #62374, #66155)
- Fixed a bug when multiple -isystem arguments are used. (#72584)
- pkg-config is now built with largefile support to ensure that it works
  correctly on filesystems with 64 bit inodes. Thanks to Peter Jones for
  the fix. (#90078)
- Bugs fixed: 7000, 19541, 26615, 62018, 62374, 63602, 66155, 66939,
  67904, 70690, 72584, 78077, 80378, 80380, 89267, 90078, 90437, 92002.