toosl/git-version-gen: use a dot to separate the commit string from the regular version

tools/git-version-gen

@@ -185,7 +185,7 @@ then
 
     # Change the first '-' to a '.', so version-comparing tools work properly.
     # Remove the "g" in git describe's output string, to save a byte.
-    v=`echo "$v" | sed 's/-/./;s/\(.*\)-g/\1-g/'`;
+    v=`echo "$v" | sed 's/-/./;s/\(.*\)-g/\1.g/'`;
     v_from_git=1
 elif test "x$fallback" = x || git --version >/dev/null 2>&1; then
     v=UNKNOWN