[NDK] Fix RTL_PAGED_CODE macro in user mode

NOP_FUNCTION is defined to "(void)0". Calling :
	RTL_PAGED_CODE();
in user mode was changed to:
	(void)0();

As "0" is not callable, this was leading to a compilation error.

sdk/include/ndk/rtlfuncs.h

@@ -247,7 +247,7 @@ RtlConvertUlongToLuid(
 //
 // This macro does nothing in user mode
 //
-#define RTL_PAGED_CODE NOP_FUNCTION
+#define RTL_PAGED_CODE()
 
 #endif