python3: disable usage of wcsftime (broken in uClibc)

Python 3 prefers usage of wcsftime() over strftime() if it's available,
however this function returns just an empty string in some older
uClibc versions. Proposed solution disables detection of wcsftime() in
./configure that results in HAVE_WCSFTIME being undefined, effectively
disabling branches of code that use possibly broken wcsftime().

See: http://lists.busybox.net/pipermail/uclibc/2014-November/048718.html

Signed-off-by: Jan Čermák <jan.cermak@nic.cz>

lang/python3/Makefile

@@ -14,7 +14,7 @@ PYTHON_VERSION:=$(PYTHON3_VERSION)
 PYTHON_VERSION_MICRO:=$(PYTHON3_VERSION_MICRO)
 
 PKG_NAME:=python3
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 PKG_VERSION:=$(PYTHON_VERSION).$(PYTHON_VERSION_MICRO)
 
 PKG_SOURCE:=Python-$(PKG_VERSION).tar.xz

lang/python3/patches/012-disable-wcsftime-detection.patch

@@ -0,0 +1,13 @@
+diff --git a/configure b/configure
+index 274af7e..85bbf0e 100755
+--- a/configure
++++ b/configure
+@@ -10555,7 +10555,7 @@ for ac_func in alarm accept4 setitimer getitimer bind_textdomain_codeset chown \
+  sigtimedwait sigwait sigwaitinfo snprintf strftime strlcpy symlinkat sync \
+  sysconf tcgetpgrp tcsetpgrp tempnam timegm times tmpfile tmpnam tmpnam_r \
+  truncate uname unlinkat unsetenv utimensat utimes waitid waitpid wait3 wait4 \
+- wcscoll wcsftime wcsxfrm wmemcmp writev _getpty
++ wcscoll wcsxfrm wmemcmp writev _getpty
+ do :
+   as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
+ ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"