Added support for gcc-5.0.0

Tested with snapshot gcc-5-20150215.tar.bz2

wmake/rules/General/coco-cpp

@@ -1,12 +0,0 @@
-# handle Coco/R attributed grammars written for the C++ version
-#     http://www.ssw.uni-linz.ac.at/Coco/
-#     http://github.com/olesenm/coco-cpp/
-#
-
-SUFFIXES += .atg
-
-atgtoo =  \
-    $(WM_THIRD_PARTY_DIR)/platforms/$(WM_ARCH)$(WM_COMPILER)/coco-cpp/bin/coco-cpp \
-    -single \
-    $< -o $(OBJECTS_DIR) && \
-    $(CC) $(c++FLAGS) -c $(@D)/$(<F).cpp -o $@

wmake/rules/General/standard

@@ -5,7 +5,6 @@ SUFFIXES=
 include $(GENERAL_RULES)/version
 include $(GENERAL_RULES)/flex
 include $(GENERAL_RULES)/flex++
-## include $(GENERAL_RULES)/coco-cpp
 ## include $(GENERAL_RULES)/byacc
 ## include $(GENERAL_RULES)/btyacc++
 include $(GENERAL_RULES)/bison