- Skip requirement of texlive-epstopdf as SLE-12 does not have that

- Skip build of documentation of fig2mpdf on SLE-12

- Make spec file build with older SLE versions as well
* This version is used by xfig 3.2.8 and above

- Add upstream commit as patch 6827c09d.patch
Global buffer overflow in fig2dev/read.c in function read_colordef()
(boo#1186329, CVE-2021-3561)

- Update to fig2dev version 3.2.8 Patchlevel 8a (Mar 2021)
o Allow closed splines with three points.
o Fix build under Darwin.
- Correct hunk offsets of the patch
o transfig-3.2.8.dif

- Update to fig2dev version 3.2.8 (Patchlevel 8 (Dec 2020)
o Use deflate to embed image data into eps output, often substantially
reducing file size.
o Embed pdf files into ps output by converting the pdf to eps.
o Allow negative arrow widths. This might be useful for asymmetric arrow
tips, which can thus be mirrored around the corresponding line.
Ticket numbers refer to https://sourceforge.net/p/mcj/tickets/#.
o Reject negative text font sizes. Fixes ticket #86.
o Allow fig files ending without previous eol character. Fixes #83, #84.
o Accept text and ellipse angles only within -2*pi to 2*pi. Fixes #76.
o Allow -1 as default TeX font, not only 0. Fixes #71, #75, #81.
o Do not allow ASCII NUL anywhere in input. Fixes #65, #68, #73, #80.
o Use getline() to improve input scanning.