[giac] remove spurious solutions e.g. for solve(cos(pi*x)+sqrt(3)*sin(pi*x)=1)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25166 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@25167 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e