parse_build_log: handle moc parse errors

6/4/12 6:58:29 PM EST: moc qfeedback.h
6/4/12 6:58:29 PM EST: qfeedback.h:59: Parse error at "FILE"
6/4/12 6:58:29 PM EST: make[5]: *** [.moc/debug-shared/moc_qfeedback.cpp] Error 1
6/4/12 6:58:29 PM EST: make[5]: *** Waiting for unfinished jobs....
6/4/12 6:58:29 PM EST: make[5]: Leaving directory `/home/qt/.pulse2-agent/data/recipes/187516428/base/qt/qtfeedback/src/plugins/feedback/mmk'
6/4/12 6:58:29 PM EST: make[4]: *** [sub-mmk-make_default] Error 2
6/4/12 6:58:29 PM EST: make[4]: Leaving directory `/home/qt/.pulse2-agent/data/recipes/187516428/base/qt/qtfeedback/src/plugins/feedback'
6/4/12 6:58:29 PM EST: make[3]: *** [sub-feedback-make_default] Error 2
6/4/12 6:58:29 PM EST: make[3]: Leaving directory `/home/qt/.pulse2-agent/data/recipes/187516428/base/qt/qtfeedback/src/plugins'
6/4/12 6:58:29 PM EST: make[2]: *** [sub-plugins-make_default-ordered] Error 2
6/4/12 6:58:29 PM EST: make[2]: Leaving directory `/home/qt/.pulse2-agent/data/recipes/187516428/base/qt/qtfeedback/src'
6/4/12 6:58:29 PM EST: make[1]: *** [module-qtfeedback-src-make_default-ordered] Error 2
6/4/12 6:58:29 PM EST: make[1]: Leaving directory `/home/qt/.pulse2-agent/data/recipes/187516428/base/qt/qtfeedback'
6/4/12 6:58:29 PM EST: make: *** [module-qtfeedback] Error 2
6/4/12 6:58:29 PM EST: make -j30 module-qtfeedback exited with status 512 at _qtqa_latest/scripts/qt/qtmod_test.pl line 989