libsanitizer: fix build on Mac 10.6

From-SVN: r206113

libsanitizer/ChangeLog

+2013-12-19  Kostya Serebryany  <kcc@google.com>
+
+        * sanitizer_common/sanitizer_platform_limits_posix.cc:
+	workaround for missing definition of EOWNERDEAD, backport
+	from upstream r196779.
+
 2013-12-06  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* sanitizer_common/sanitizer_platform_limits_posix.h

libsanitizer/sanitizer_common/sanitizer_platform_limits_posix.cc

@@ -760,7 +760,12 @@ namespace __sanitizer {
   unsigned IOCTL_TIOCSSERIAL = TIOCSSERIAL;
 #endif
 
+// EOWNERDEAD is not present in some older platforms.
+#if defined(EOWNERDEAD)
   extern const int errno_EOWNERDEAD = EOWNERDEAD;
+#else
+  extern const int errno_EOWNERDEAD = -1;
+#endif
 }  // namespace __sanitizer
 
 COMPILER_CHECK(sizeof(__sanitizer_pthread_attr_t) >= sizeof(pthread_attr_t));