Compile python as if link(2) is not available

From Android 6.0 on hard links are not permitted, so remove
link to force e.g. _vendor/lockfile/linklockfile.py to use
other mechanisms. Fixes #29.

packages/python/configure.patch

@@ -0,0 +1,12 @@
+diff -u -r ../Python-3.5.0/configure ./configure
+--- ../Python-3.5.0/configure	2015-09-13 07:41:26.000000000 -0400
++++ ./configure	2015-10-19 19:09:59.295440276 -0400
+@@ -10946,8 +10946,6 @@
+ _ACEOF
+ if ac_fn_c_try_compile "$LINENO"; then :
+ 
+-$as_echo "#define HAVE_LINK 1" >>confdefs.h
+-
+    { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+ $as_echo "yes" >&6; }
+ else