android rot13

before:
$ ./repo/android.sh kati -c -use_find_cache -kati_stats
*kati*: eval time: "34.677942345s"
*kati*: shell func time: "13.71144088s" 559
*kati*: dep build prepare time: "213.586963ms"
*kati*: 52737 variables
*kati*: 78461 explicit rules
*kati*: 0 implicit rules
*kati*: 1 suffix rules
*kati*: dep build time: "2.016057014s"
./repo/android.sh kati -c -use_find_cache -kati_stats  36.32s user 22.01s system 157% cpu 37.023 total

after:
$ ./repo/android.sh kati -c -use_find_cache -kati_stats
*kati*: eval time: "30.99209655s"
*kati*: shell func time: "10.133065433s" 385
*kati*: dep build prepare time: "236.542165ms"
*kati*: 52737 variables
*kati*: 78461 explicit rules
*kati*: 0 implicit rules
*kati*: 1 suffix rules
*kati*: dep build time: "1.880664823s"
./repo/android.sh kati -c -use_find_cache -kati_stats  36.65s user 18.09s system 164% cpu 33.218 total
2 files changed