- FindGLIB2.cmake updates from

- FindGLIB2.cmake updates from
  http://www.opensync.org/browser/branches/3rd-party-cmake-modules/modules
  + split out FindGMODULE2.cmake
  + contains /sw/... by default
  + supposedly tested on OSX
- Disable pcre for cmake builds by default, gregex should be
  picked up automatically if glib2 is not too old.

Should you have trouble linking due to some libgmodule... stuff
undefined, please add "${GMODULE2_LIBRARIES}" after "${GLIB2_LIBRARIES}"
an report back.

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@34248 f5534014-38df-0310-8fa8-9805f1628bb7