firefox: add patch to fix GenerateCSS{PropsGenerated,2PropertiesWebIDL}.py

srcpkgs/firefox/patches/fix-python-foo.patch

@@ -0,0 +1,23 @@
+reverted from https://hg.mozilla.org/mozilla-central/rev/aa63a2a40325
+--- dom/bindings/GenerateCSS2PropertiesWebIDL.py.orig
++++ dom/bindings/GenerateCSS2PropertiesWebIDL.py
+@@ -16,7 +16,7 @@
+     return "  [%s] attribute DOMString %s;\n" % (", ".join(extendedAttrs),
+                                                  propName)
+ def generate(output, idlFilename, preprocessorHeader):
+-    cpp = list(buildconfig.substs['CPP'])
++    cpp = shellutil.split(buildconfig.substs['CPP'])
+     cpp += shellutil.split(buildconfig.substs['ACDEFINES'])
+     cpp.append(preprocessorHeader)
+     preprocessed = subprocess.check_output(cpp)
+--- layout/style/GenerateCSSPropsGenerated.py.orig
++++ layout/style/GenerateCSSPropsGenerated.py
+@@ -10,7 +10,7 @@
+ from mozbuild import shellutil
+ 
+ def get_properties(preprocessorHeader):
+-    cpp = list(buildconfig.substs['CPP'])
++    cpp = shellutil.split(buildconfig.substs['CPP'])
+     cpp += shellutil.split(buildconfig.substs['ACDEFINES'])
+     cpp.append(preprocessorHeader)
+     preprocessed = subprocess.check_output(cpp)