Revert "cmake: fixed path to qt mkspecs dir"

This reverts commit 2df13c85e866c7fc289cac867279bfc155a6307a.

It was wrong commit. Read http://qt-project.org/doc/qt-5/qmake-advanced-usage.html#adding-new-configuration-features
for detailes.
cmake: added to previous commit
cmake: added new option OSX_FRAMEWORK
cmake: USE_RELATIVE_PATHS now is option
cmake: plugins on Mac OS must use .dylib suffix
cmake: do not use trailing slash for normalized paths
added frameworks support to crypto.prf