Merge commit '3aa9c523'

* commit '3aa9c523':
  libavutil: Define the noreturn attribute for clang in MSVC mode as well
Merged-by: James Almer <jamrial@gmail.com>

libavutil/attributes.h

@@ -158,7 +158,7 @@
 #    define av_printf_format(fmtpos, attrpos)
 #endif
 
-#if AV_GCC_VERSION_AT_LEAST(2,5)
+#if AV_GCC_VERSION_AT_LEAST(2,5) || defined(__clang__)
 #    define av_noreturn __attribute__((noreturn))
 #else
 #    define av_noreturn