Improve git describe options: --always, --dirty
Improve git describe options: --always, --dirty

--dirty is important to indicate a build with uncommitted changes.

harold-b/duktape,sloth4413/duktape,tassmjau/duktape,pombredanne/duktape,thurday/duktape,reqshark/duktape,tassmjau/duktape,harold-b/duktape,kphillisjr/duktape,harold-b/duktape,zeropool/duktape,haosu1987/duktape,tassmjau/duktape,haosu1987/duktape,svaarala/duktape,rwaldron/duktape,nivertech/duktape,harold-b/duktape,tassmjau/duktape,eddieh/duktape,chenyaqiuqiu/duktape,eddieh/duktape,chenyaqiuqiu/duktape,nivertech/duktape,markand/duktape,reqshark/duktape,skomski/duktape,chenyaqiuqiu/duktape,eddieh/duktape,nivertech/duktape,haosu1987/duktape,nivertech/duktape,markand/duktape,harold-b/duktape,kphillisjr/duktape,pombredanne/duktape,reqshark/duktape,sloth4413/duktape,zeropool/duktape,jmptrader/duktape,daimajia/duktape,thurday/duktape,haosu1987/duktape,tassmjau/duktape,jmptrader/duktape,pombredanne/duktape,markand/duktape,nivertech/duktape,nivertech/duktape,svaarala/duktape,thurday/duktape,sloth4413/duktape,kphillisjr/duktape,daimajia/duktape,jmptrader/duktape,zeropool/duktape,kphillisjr/duktape,sloth4413/duktape,zeropool/duktape,markand/duktape,chenyaqiuqiu/duktape,eddieh/duktape,skomski/duktape,markand/duktape,pombredanne/duktape,markand/duktape,tassmjau/duktape,thurday/duktape,daimajia/duktape,skomski/duktape,chenyaqiuqiu/duktape,thurday/duktape,markand/duktape,kphillisjr/duktape,pombredanne/duktape,nivertech/duktape,haosu1987/duktape,jmptrader/duktape,zeropool/duktape,sloth4413/duktape,svaarala/duktape,pombredanne/duktape,skomski/duktape,sloth4413/duktape,reqshark/duktape,chenyaqiuqiu/duktape,tassmjau/duktape,skomski/duktape,thurday/duktape,reqshark/duktape,thurday/duktape,rwaldron/duktape,svaarala/duktape,reqshark/duktape,reqshark/duktape,jmptrader/duktape,nivertech/duktape,haosu1987/duktape,eddieh/duktape,skomski/duktape,daimajia/duktape,harold-b/duktape,haosu1987/duktape,tassmjau/duktape,reqshark/duktape,reqshark/duktape,chenyaqiuqiu/duktape,markand/duktape,kphillisjr/duktape,haosu1987/duktape,thurday/duktape,markand/duktape,svaarala/duktape,chenyaqiuqiu/duktape,markand/duktape,zeropool/duktape,svaarala/duktape,sloth4413/duktape,sloth4413/duktape,harold-b/duktape,skomski/duktape,pombredanne/duktape,kphillisjr/duktape,eddieh/duktape,tassmjau/duktape,rwaldron/duktape,nivertech/duktape,haosu1987/duktape,harold-b/duktape,zeropool/duktape,jmptrader/duktape,jmptrader/duktape,harold-b/duktape,eddieh/duktape,skomski/duktape,pombredanne/duktape,daimajia/duktape,tassmjau/duktape,zeropool/duktape,rwaldron/duktape,kphillisjr/duktape,svaarala/duktape,skomski/duktape,svaarala/duktape,jmptrader/duktape,sloth4413/duktape,reqshark/duktape,harold-b/duktape,jmptrader/duktape,sloth4413/duktape,thurday/duktape,chenyaqiuqiu/duktape,daimajia/duktape,svaarala/duktape,haosu1987/duktape,eddieh/duktape,rwaldron/duktape,zeropool/duktape,pombredanne/duktape,rwaldron/duktape,thurday/duktape,zeropool/duktape,pombredanne/duktape,chenyaqiuqiu/duktape,jmptrader/duktape,skomski/duktape,nivertech/duktape,kphillisjr/duktape,eddieh/duktape,eddieh/duktape,kphillisjr/duktape