Orgnize coverage info

testing/coverage/coverall

@@ -17,7 +17,7 @@ function test_package {
   fi
 }
 
-echo "mode: set" > coverall.out
+touch coverall.out
 
 test_package "common/net" "common/net"
 test_package "proxy/socks" "proxy/socks,proxy/socks/protocol"
@@ -26,6 +26,10 @@ test_package "proxy/vmess" "common/io,common/net,proxy/vmess,proxy/vmess/protoco
 test_package "proxy/vmess/protocol" "proxy/vmess/protocol,proxy/vmess/protocol/user"
 test_package "proxy/vmess/protocol/user" "proxy/vmess/protocol/user"
 
+cat coverall.out | sort -t: -k1 > coverallsorted.out
+echo "mode: set" | cat - coverallsorted.out > coverall.out
+rm coverallsorted.out
+
 if [ "$FAIL" -eq 0 ]; then
   $HOME/gopath/bin/goveralls -v -coverprofile=coverall.out -service=travis-ci -repotoken $COVERALLS_TOKEN
 fi