FEM Post: Give access to cmake BUILD variables from python

This commit adds a attribute __cmake__ to App which is a list holding all compile time cmake variables starting with BUILD.

Only export BUILD variables

src/App/FreeCADInit.py

@@ -150,6 +150,9 @@ Err = FreeCAD.Console.PrintError
 Wrn = FreeCAD.Console.PrintWarning
 test_ascii = lambda s: all(ord(c) < 128 for c in s)
 
+#store the cmake variales
+App.__cmake__ = cmake;
+
 Log ('Init: starting App::FreeCADInit.py\n')
 
 # init every application by importing Init.py