Bug 928808: Suppress clang warnings (in newer clang versions) about inline 'new' and 'delete'. r=glandium

configure.in

@@ -1455,8 +1455,12 @@ if test "$GNU_CXX"; then
 
     # Turn off the following warnings that -Wall turns on:
     # -Wno-invalid-offsetof - we use offsetof on non-POD types frequently
+    # -Wno-inline-new-delete - we inline 'new' and 'delete' in mozalloc
+    #   for performance reasons, and because GCC and clang accept it (though
+    #   clang warns about it).
     #
     MOZ_CXX_SUPPORTS_WARNING(-Wno-, invalid-offsetof, ac_cxx_has_wno_invalid_offsetof)
+    MOZ_CXX_SUPPORTS_WARNING(-Wno-, inline-new-delete, ac_cxx_has_wno_inline_new_delete)
 
     if test -z "$INTEL_CXX" -a -z "$CLANG_CXX"; then
        # Don't use -Wcast-align with ICC or clang