Also pass -fno-exceptions when building with clang

Review Request #115395 - Created Jan. 29, 2014 and submitted - Latest diff uploaded

Alex Richardson
buildsystem, extracmakemodules, kdeframeworks
Also pass -fno-exceptions when building with clang

All of KF5 + kate + kde-workspace compile with clang and -fno-exceptions

The only problem related to clang and -fno-exceptions I could find was and that is fixed since
clang version 3.0 which was released in December 2011
compiled all of kf5 + kate + kde-workspace without any issues using clang 3.3

Would be good if someone with an older clang version could test it and see whether it works.
May also be related to the libstdc++ headers (4.8 installed here).