Bug 1451931 - Enable C++14 for SpiderMonkey Rust Bindings. r=glandium

MozReview-Commit-ID: K2vKiC9aAJx

--HG--
extra : rebase_source : a69671e6a0f776544d20300871dd52560ae177ab

js/rust/CMakeLists.txt

@@ -26,7 +26,7 @@ else()
     add_definitions(-Wno-c++0x-extensions -Wno-return-type-c-linkage -Wno-invalid-offsetof)
   endif()
   add_definitions(-fPIC -fno-rtti)
-  add_definitions(-std=c++11 -DJS_NO_JSVAL_JSID_STRUCT_TYPES)
+  add_definitions(-std=c++14 -DJS_NO_JSVAL_JSID_STRUCT_TYPES)
   add_definitions(-include $ENV{DEP_MOZJS_OUTDIR}/js/src/js-confdefs.h)
 endif()