Auto merge of #1541 - Hylian:android-rlim-infinity, r=gnzlbg

Add `RLIM_INFINITY` definition for Android

This adds the definition for `RLIM_INFINITY` to Android, mirroring the Linux definition. Ran into this while trying to build `sccache` natively in Termux on Android, and is the only thing preventing `sccache` from building on libc master.