- Defines FIND_PACKAGE_MESSAGE function to help display
find result messages only once
- Added use of it to FindPackageHandleStandardArgs
- Added use of it to FindQt4, and FindX11
- This cleans up repeated messages in big projects
FIND_PACKAGE_HANDLE_STANDARD_ARGS(), so cmake modules can specify their own
better failure messages. If the default is ok use "DEFAULT_MSG".
Do this also for FindBoost.cmake (#5349)
Alex