Don't pass REALNAME to `.end`

Putting the procedure there is an MSVC-ism, where it is optional. GCC silently ignores and Clang errors, so it is best to remove this.

common_x86_64.h

@@ -396,7 +396,7 @@ REALNAME:
 
 #define PROFCODE
 
-#define EPILOGUE .end	 REALNAME
+#define EPILOGUE .end
 #endif
 
 #if defined(OS_LINUX) || defined(OS_FREEBSD) || defined(OS_NETBSD) || defined(__ELF__) || defined(C_PGI)