bug 1198226 - Add HOST_{C,CXX}FLAGS recursive make varible blacklist. r=mshal

--HG--
extra : commitid : FoL068jTSIs
extra : rebase_source : c520079216e1d53e2bfca01a14d391d0e86e25a0

python/mozbuild/mozbuild/backend/recursivemake.py

@@ -95,8 +95,10 @@ MOZBUILD_VARIABLES = [
     b'FORCE_SHARED_LIB',
     b'FORCE_STATIC_LIB',
     b'FINAL_LIBRARY',
+    b'HOST_CFLAGS',
     b'HOST_CSRCS',
     b'HOST_CMMSRCS',
+    b'HOST_CXXFLAGS',
     b'HOST_EXTRA_LIBS',
     b'HOST_LIBRARY_NAME',
     b'HOST_PROGRAM',