uClibc: Fix lookup with DNS search in multi-threaded application.

Signed-off-by: Jiri Slachta <slachta@cesnet.cz>

SVN-Revision: 39179

toolchain/uClibc/patches-0.9.33.2/137-inet_fix_threaded_res_init.patch

+--- a/libc/inet/resolv.c
++++ b/libc/inet/resolv.c
+@@ -3581,6 +3581,7 @@ res_init(void)
+ 	if (!_res.id)
+ 		_res.id = res_randomid();
+ 
++	__res_sync = NULL;
+ 	__res_vinit(&_res, 1);
+ 	__res_sync = res_sync_func;
+ 
+--
+cgit v0.9.1