build: fix: remove error output
build: fix: remove error output

while git not found in path, error is output to console.

koharjidan/dogecoin,koharjidan/dogecoin,coinkeeper/2015-06-22_18-37_dogecoin,coinwarp/dogecoin,jarymoth/dogecoin,langerhans/dogecoin,brishtiteveja/sherlockcoin,coinkeeper/2015-06-22_18-37_dogecoin,coinwarp/dogecoin,Domer85/dogecoin,langerhans/dogecoin,coinkeeper/2015-06-22_18-37_dogecoin,langerhans/dogecoin,Exceltior/dogecoin,marklai9999/Taiwancoin,coinwarp/dogecoin,marklai9999/Taiwancoin,brishtiteveja/sherlockcoin,koharjidan/dogecoin,coinkeeper/2015-06-22_18-37_dogecoin,haisee/dogecoin,marklai9999/Taiwancoin,jarymoth/dogecoin,Exceltior/dogecoin,Domer85/dogecoin,jarymoth/dogecoin,Domer85/dogecoin,Exceltior/dogecoin,Exceltior/dogecoin,coinwarp/dogecoin,langerhans/dogecoin,langerhans/dogecoin,koharjidan/dogecoin,Exceltior/dogecoin,brishtiteveja/sherlockcoin,koharjidan/dogecoin,coinkeeper/2015-06-22_18-37_dogecoin,koharjidan/dogecoin,langerhans/dogecoin,marklai9999/Taiwancoin,haisee/dogecoin,haisee/dogecoin,brishtiteveja/sherlockcoin,jarymoth/dogecoin,coinwarp/dogecoin,haisee/dogecoin,jarymoth/dogecoin,haisee/dogecoin,Domer85/dogecoin,brishtiteveja/sherlockcoin