ENH: add support for xlf with -WF,-D for -D

Modules/Platform/AIX-VisualAge-Fortran.cmake

@@ -1 +1 @@
-include(Platforms/xlf)
+include(Platform/xlf)

Modules/Platform/Linux-VisualAge-Fortran.cmake

@@ -1,3 +1,3 @@
 SET(CMAKE_SHARED_LIBRARY_C_FLAGS "")        
 SET(CMAKE_SHARED_LIBRARY_LINK_C_FLAGS "")  
-include(Platforms/xlf)
+include(Platform/xlf)