Bug 761516. Rename webapprt/linux to webapprt/gtk2 as we are building for all gtk2 platforms. r=marco

--HG--
rename : webapprt/linux/Makefile.in => webapprt/gtk2/Makefile.in
rename : webapprt/linux/webapprt.cpp => webapprt/gtk2/webapprt.cpp

webapprt/Makefile.in

@@ -25,8 +25,8 @@ ifeq ($(OS_ARCH),Darwin)
 DIRS += mac
 else
 ifeq ($(MOZ_WIDGET_TOOLKIT),gtk2)
-DIRS += linux
-endif # linux
+DIRS += gtk2
+endif # gtk2
 endif # mac
 endif # windows