external/python3: Fix memory leak in configure check code

...that LeakSanitizer would complain about, causing the check to erroneously fail.

Change-Id: Ieaef38576afd6196d38f395d48fd1bc92b22ddb6

external/python3/UnpackedTarball_python3.mk

@@ -30,6 +30,7 @@ $(eval $(call gb_UnpackedTarball_add_patches,python3,\
 	external/python3/python-3.3.3-py17797.patch.1 \
 	external/python3/python-3.3.3-msvc2012-winxp.patch.1 \
 	external/python3/python-3.3.5-pyexpat-symbols.patch.1 \
+	external/python3/python-lsan.patch.0 \
 ))
 
 ifneq ($(filter DRAGONFLY FREEBSD LINUX NETBSD OPENBSD SOLARIS,$(OS)),)

external/python3/python-lsan.patch.0

+--- configure
++++ configure
+@@ -11821,6 +11821,7 @@
+         break;
+       }
+     }
++    freeaddrinfo(aitop);
+   }
+ 
+   if (!(inet4 == 0 || inet4 == 2))
+@@ -11828,8 +11829,6 @@
+   if (!(inet6 == 0 || inet6 == 2))
+     goto bad;
+ 
+-  if (aitop)
+-    freeaddrinfo(aitop);
+   return 0;
+ 
+  bad: