Ensure Windows Bash script works on all versions

(cherry picked from commit 196bc53)

Author: damieng

resources/win/atom.sh

@@ -1,2 +1,5 @@
 #!/bin/sh
-$(dirname "$0")/atom.cmd "$@"
+pushd $(dirname "$0") > /dev/null
+ATOMCMD=""$(pwd -W)"/atom.cmd"
+popd > /dev/null
+cmd.exe //c "$ATOMCMD" "$@"