python3: Update to 3.4.3

mingw-w64-python3/0500-add-python-config-sh.patch

@@ -66,7 +66,7 @@ diff -urN a/Misc/python-config.sh.in b/Misc/python-config.sh.in
 +if [ "$ABIFLAGS" = "@""ABIFLAGS""@" ] ; then
 +    ABIFLAGS=
 +fi
- LIBS="@LIBS@ $SYSLIBS -lpython${VERSION}${ABIFLAGS}"
+ LIBS="-lpython${VERSION}${ABIFLAGS} @LIBS@ $SYSLIBS"
  BASECFLAGS="@BASECFLAGS@"
 -LDLIBRARY="@LDLIBRARY@"
 -LINKFORSHARED="@LINKFORSHARED@"