[sanitizer] Don't define common ReportDeadlySignal on Fuchsia

This causes a linker error because of duplicate symbol since
ReportDeadlySignal is defined both in sanitizer_common_libcdep and
sanitizer_fuchsia.

Differential Revision: https://reviews.llvm.org/D37952

llvm-svn: 313641

compiler-rt/lib/sanitizer_common/sanitizer_common_libcdep.cc

@@ -147,7 +147,7 @@ void BackgroundThread(void *arg) {
 }
 #endif
 
-#if !SANITIZER_GO
+#if !SANITIZER_FUCHSIA && !SANITIZER_GO
 void StartReportDeadlySignal() {
   // Write the first message using fd=2, just in case.
   // It may actually fail to write in case stderr is closed.
@@ -254,7 +254,7 @@ void ReportDeadlySignal(const SignalContext &sig, u32 tid,
   else
     ReportDeadlySignalImpl(sig, tid, unwind, unwind_context);
 }
-#endif  // !SANITIZER_GO
+#endif  // !SANITIZER_FUCHSIA && !SANITIZER_GO
 
 void WriteToSyslog(const char *msg) {
   InternalScopedString msg_copy(kErrorMessageBufferSize);