Add wild-card suffix for Makefile

With "CONFIG=debug_and_release" qmake generates both Makefile.Debug and
Makefile.Release. And I assume it is useful to have all types Makefiles
ignored.
Signed-off-by: Alexey Brodkin <alexey.brodkin@gmail.com>

Qt.gitignore

@@ -16,5 +16,5 @@
 *.pro.user.*
 moc_*.cpp
 qrc_*.cpp
-Makefile
+Makefile*
 *-build-*