message: Fix the Xcode project (pt. 2)
  Apparently LLVM's libSupport depends on libDemangle to print the stack
  trace. I'm not sure if this is desired but for now we don't have much
  choice if we want to turn to bot green again.
diff: "-L$(LLVM_BUILD_DIR)/$(LLVM_BUILD_DIR_ARCH)/lib",
  "-lLLVMOption",
  "-lLLVMSupport",
  + "-lLLVMDemangle",
  );
  "OTHER_LDFLAGS[sdk=macosx*]" = (
  "$(inherited)",
  "-L$(LLVM_BUILD_DIR)/$(LLVM_BUILD_DIR_ARCH)/lib",
  "-lLLVMOption",
  "-lLLVMSupport",
  + "-lLLVMDemangle",
  "$(PROJECT_DIR)/tools/driver/lldb-Info.plist",
  "-Wl,-rpath,@loader_path/../../Library/PrivateFrameworks",
  "-Wl,-rpath,@loader_path/../../../SharedFrameworks",
  "-L$(LLVM_BUILD_DIR)/$(LLVM_BUILD_DIR_ARCH)/lib",
  "-lLLVMOption",
  "-lLLVMSupport",
  + "-lLLVMDemangle",
  );
  PRODUCT_NAME = lldb;
  USER_HEADER_SEARCH_PATHS = "$(SRCROOT)/include $(SRCROOT)/source $(LLVM_SOURCE_DIR)/include $(LLVM_BUILD_DIR)/$(LLVM_BUILD_DIR_ARCH)/include ${LLDB_BUILD_DIR}/include";
  "-L$(LLVM_BUILD_DIR)/$(LLVM_BUILD_DIR_ARCH)/lib",
  "-lLLVMOption",
  "-lLLVMSupport",
  + "-lLLVMDemangle",
  );
  PRODUCT_NAME = lldb;
  USER_HEADER_SEARCH_PATHS = "$(SRCROOT)/include $(SRCROOT)/source $(LLVM_SOURCE_DIR)/include $(LLVM_BUILD_DIR)/$(LLVM_BUILD_DIR_ARCH)/include";
  