update for gnumeric

- Add gnumeric-CVE-2013-6836.patch: fix Heap-buffer-overflow in
ms_escher_get_data on a fuzzed xls file (bnc#856254, bgo#712772,
CVE-2013-6836).

Fixed bugs
bnc#856254
VUL-1: CVE-2013-6836: gnumeric: gnumeric: heap-based buffer overflow in ms_escher_get_data function
Selected Binaries
openSUSE Build Service is sponsored by