Add the new @llvm.nacl.atomic.fence.all intrinsic

lib/IR/CMakeLists.txt

 add_llvm_library(LLVMCore
   AsmWriter.cpp
   Attributes.cpp
   AutoUpgrade.cpp
   BasicBlock.cpp
   ConstantFold.cpp
   Constants.cpp
   Core.cpp
   DataLayout.cpp
   DebugInfo.cpp
   DebugLoc.cpp
   DIBuilder.cpp
   Dominators.cpp
   Function.cpp
   GCOV.cpp
   GVMaterializer.cpp
   Globals.cpp
   IRBuilder.cpp
   InlineAsm.cpp
   Instruction.cpp
   Instructions.cpp
   IntrinsicInst.cpp
   LLVMContext.cpp
   LLVMContextImpl.cpp
   LeakDetector.cpp
   Metadata.cpp
   Module.cpp
+  NaClAsm.cpp
   NaClAtomicIntrinsics.cpp
   Pass.cpp
   PassManager.cpp
   PassRegistry.cpp
   PrintModulePass.cpp
   Type.cpp
   TypeFinder.cpp
   Use.cpp
   User.cpp
   Value.cpp
   ValueSymbolTable.cpp
   ValueTypes.cpp
   Verifier.cpp
   )
 
 # Workaround: It takes over 20 minutes to compile with msvc10.
 # FIXME: Suppressing optimizations to core libraries would not be good thing.
 if( MSVC_VERSION LESS 1700 )
 set_property(
   SOURCE Function.cpp
   PROPERTY COMPILE_FLAGS "/Og-"
   )
 endif()
 
 add_dependencies(LLVMCore intrinsics_gen)