File fix-build.patch of Package failed_webrtc-audio-processing

*** Begin Patch
*** Add File: webrtc/api/scoped_refptr.h.prepend
+// Workaround: Undefine common macros named Nullable/Nonnull that break absl types.
+#if defined(Nullable)
+#  undef Nullable
+#  define WEBRTC_APS_UNDEF_NULLABLE
+#endif
+#if defined(Nonnull)
+#  undef Nonnull
+#  define WEBRTC_APS_UNDEF_NONNULL
+#endif
+
*** End Patch