More patches to keep Qt on XP
* Makefile.am (EXTRA_DIST): Update accordingly. * patches/qtbase/windowsxp-support-revert-2.patch patches/qtbase/windowsxp-support-revert.patch: New. Reverting changes made to remove XP support. * patches/qtbase/windowsxp-support.patch: Add a hunk.
This also fixes compiling with the default mingw under jessie.