iOS patch no 1: Select operating system; from StephenBlackheath
iOS patch no 2: remove obsolete CROSS_COMPILE variable; #7699

From StephenBlackheath
Add missing ;; in aclocal.m4
Whitespace only
Remove support for the --enable-hc-boot flag in configure

This porting method has bitrotted; use cross-compilation now
Layout only
Hardcode "BootingFromHc = NO" for now