[lldb] Support tests with nested make invocations on Windows

Author: weliveindetail

lldb/test/API/functionalities/completion/Makefile

@@ -4,7 +4,7 @@ USE_LIBDL := 1
 a.out: lib_shared
 
 lib_shared:
-	$(MAKE) -f $(MAKEFILE_RULES) \
+	"$(MAKE)" -f $(MAKEFILE_RULES) \
 		DYLIB_ONLY=YES DYLIB_CXX_SOURCES=shared.cpp DYLIB_NAME=shared
 
 include Makefile.rules