Merge "Declare __FAKE_USE_VA_ARGS as a variadic function."

/*

 * Use __VA_ARGS__ if running a static analyzer,

 * to avoid warnings of unused variables in __VA_ARGS__.

 * __FAKE_USE_VA_ARGS is undefined at link time,

 * so don't link with __clang_analyzer__ defined.

 */

#ifdef __clang_analyzer__

#define __FAKE_USE_VA_ARGS(...) ((void)(__VA_ARGS__))

extern void __FAKE_USE_VA_ARGS(...);

#else

#define __FAKE_USE_VA_ARGS(...) ((void)(0))

#endif