cmake: Don't mark header-only frameworks with the FRAMEWORK property.

CMake INTERFACE targets may only have whitelisted properties, and
FRAMEWORK is not in the whitelist in released CMake versions.

Change-Id: I27cd0cfbe1b52f25c91bf1b3c0d55879bed91bdf
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@theqtcompany.com>
Reviewed-by: Stephen Kelly <steveire@gmail.com>

mkspecs/features/data/cmake/Qt5BasicConfig.cmake.in

@@ -232,9 +232,11 @@ if (NOT TARGET Qt5::$${CMAKE_MODULE_NAME})
     add_library(Qt5::$${CMAKE_MODULE_NAME} SHARED IMPORTED)
 !!ENDIF
 !!ENDIF
+!!IF !equals(TEMPLATE, aux)
 !!IF !isEmpty(CMAKE_BUILD_IS_FRAMEWORK)
     set_property(TARGET Qt5::$${CMAKE_MODULE_NAME} PROPERTY FRAMEWORK 1)
 !!ENDIF
+!!ENDIF // TEMPLATE != aux
 
     set_property(TARGET Qt5::$${CMAKE_MODULE_NAME} PROPERTY
       INTERFACE_INCLUDE_DIRECTORIES ${_Qt5$${CMAKE_MODULE_NAME}_OWN_INCLUDE_DIRS})