libc/quad: fix missing closing #endif in Symbol.map

Without this lib32 libc.so.7 would be missing critical symbols,
including malloc / free and all syscall wrappers.

lib/libc/quad/Symbol.map

@@ -50,4 +50,5 @@ FBSD_1.0 {
 	__udivdi3;
 	__umoddi3;
 	__xordi3;
+#endif
 };