[giac] Bug fix in sum, string, fsolve in degree mode

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35286 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Changing giac.js to the latest version in web/kickstart.xml

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35287 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
[giac] fix ggbsort for empty lists

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35288 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
4.9.297.0

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35289 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e