ENH: Module to find and configure GCCXML and GCCXML_FLAGS.

Modules/FindGCCXML.cmake

@@ -0,0 +1,9 @@
+FIND_PROGRAM(GCCXML gccxml
+             /usr/local/bin
+             /usr/bin
+             [HKEY_CURRENT_USER\\Software\\Kitware\\GCC_XML;loc]
+             "C:/Program Files/GCC_XML")
+
+IF(GCCXML)
+  CONFIGURE_GCCXML(${GCCXML} GCCXML_FLAGS)
+ENDIF(GCCXML)