Bug 648735 - Define stat64 to stat on Open/FreeBSD, since they don't have stat64() but stat handles >2Gb files fine; r=cjones

lifted from freebsd's www/firefox/files/patch-ipc-chromium-src-base-file_util_posix.cc
and https://bugzilla.mozilla.org/attachment.cgi?id=527621

ipc/chromium/src/base/file_util_posix.cc

@@ -30,6 +30,11 @@
 #include "base/string_util.h"
 #include "base/time.h"
 
+// FreeBSD/OpenBSD lacks stat64, but its stat handles files >2GB just fine
+#if defined(OS_FREEBSD) || defined(OS_OPENBSD)
+#define stat64 stat
+#endif
+
 namespace file_util {
 
 #if defined(GOOGLE_CHROME_BUILD)