Fix so that includes like <QtCompositor/WaylandXXX> work

Change-Id: I96e78f55aa60f89c12ec0b970aae22abed225142
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>

modules/qt_compositor.pri

@@ -5,7 +5,7 @@ QT.compositor.PATCH_VERSION = 0
 
 QT.compositor.name = QtCompositor
 QT.compositor.bins = $$QT_MODULE_BIN_BASE
-QT.compositor.includes = $$QT_MODULE_INCLUDE_BASE/QtCompositor
+QT.compositor.includes = $$QT_MODULE_INCLUDE_BASE $$QT_MODULE_INCLUDE_BASE/QtCompositor
 QT.compositor.private_includes = $$QT_MODULE_INCLUDE_BASE/QtCompositor/$$QT.compositor.VERSION
 QT.compositor.sources = $$QT_MODULE_BASE/src/compositor
 QT.compositor.libs = $$QT_MODULE_LIB_BASE