Fix the Qt 5 version required to run the IncompatibleQt test.

The commit to add the INTERFACE_QT_MAJOR_VERSION in qtbase.git
is 14054d45 (Set the INTERFACE_QT_MAJOR_VERSION to 5., 2013-03-16)
which will be part of Qt 5.1.0.

If there is a Qt 5.0.3 release, there is no guarantee it will
contain that commit. Make sure such a Qt version does not fail
with this test if not.

Tests/RunCMake/CMakeLists.txt

@@ -77,7 +77,7 @@ add_RunCMake_test(CMP0004)
 
 find_package(Qt4 QUIET)
 find_package(Qt5Core QUIET)
-if (QT4_FOUND AND Qt5Core_FOUND AND Qt5Core_VERSION VERSION_GREATER 5.0.2)
+if (QT4_FOUND AND Qt5Core_FOUND AND NOT Qt5Core_VERSION VERSION_LESS 5.1.0)
   add_RunCMake_test(IncompatibleQt)
 endif()