Do not inline V8_Fatal in the hope for better stack traces

Several stack traces from crash reports in https://crbug.com/754490 have
wrong magic signatures. Even though we're supposed to be failing in a V8_Fatal
the signature doesn't show up on the stack trace.

Change-Id: I35c8f27e36fd2a0ec474095a6cf5557a76fe7d26
Reviewed-on: https://chromium-review.googlesource.com/631878Reviewed-by: Jakob Gruber <jgruber@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#47575}

src/base/logging.h

@@ -14,7 +14,7 @@
 #include "src/base/compiler-specific.h"
 #include "src/base/template-utils.h"
 
-[[noreturn]] PRINTF_FORMAT(3, 4) V8_BASE_EXPORT
+[[noreturn]] PRINTF_FORMAT(3, 4) V8_BASE_EXPORT V8_NOINLINE
     void V8_Fatal(const char* file, int line, const char* format, ...);
 
 // The FATAL, UNREACHABLE and UNIMPLEMENTED macros are useful during