Merge pull request pyside#49 from dashesy/qmake_qt4_default

Try qmake-qt4 before giving up on qmake.

Author: lck

setup.py

@@ -125,6 +125,8 @@
 
 if OPTION_QMAKE is None:
     OPTION_QMAKE = find_executable("qmake")
+if OPTION_QMAKE is None:
+    OPTION_QMAKE = find_executable("qmake-qt4")
 if OPTION_CMAKE is None:
     OPTION_CMAKE = find_executable("cmake")