gcal: include sys/types.h instead of stdint.h in gnulib patch

This makes compilation work on 32bit arches, as well as 64bit arches.

packages/gcal/gnulib.patch

@@ -4,7 +4,7 @@
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
-+#include <stdint.h>
++#include <sys/types.h>
 +#include <bits/struct_file.h>
 +
  #include <config.h>
@@ -16,7 +16,7 @@
  #endif
  
  #include <errno.h>                             /* For detecting Plan9.  */
-+#include <stdint.h>
++#include <sys/types.h>
 +#include <bits/struct_file.h>
  
  #if defined __sferror || defined __DragonFly__ || defined __ANDROID__