[SYSREG2] Upgrade "revision.c" to Git from SVN

[SergeGautherie]

Fixes

echo 'const int SVNRev = ' > revision.c
LC_ALL=C LANG=C svn info | grep Revision | cut -f 2 -d " " >> revision.c
svn: E155007: '/home/appveyor/sysreg2_workdir' is not a working copy
echo ';' >> revision.c
gcc -I/usr/include/libvirt/ -I/usr/include/libxml2/ -g -O0 -std=c99 -D_GNU_SOURCE -Wall -Wextra -c revision.c -o revision.o
revision.c:2:1: error: expected expression before ‘;’ token
;
^
makefile:26: recipe for target 'revision.o' failed
make: *** [revision.o] Error 1

--

Result example:
sysreg2 65d7945 starting

---

Obviously, creating at least 1 tag in Git would be interesting...

[SergeGautherie]

Thanks @ColinFinck.
Please, check why your commit did not use my public email address.

[learn-more]

Probably because they used the website squash feature, and then it uses the public email from your profile (which is none, hence the noreply)