darwin: fix make prepare, force prebuilt host compiler

android: fix makefile to build on AOSP

current AOSP (master) seems a bit different regarding
the variable $(TARGET_OUT_INTERMEDIATES)

Change-Id: Iffc3dfb1f015263ad32447fa5b8855fb54560562
selinux: remove dependency on libsepol static lib

runcon applet is including flask.h for constants

the only one required is SECCLASS_PROCESS (2)

Change-Id: Ia57abc21b291e7cbf81fdd031baaa5ac4436cbc8
Android: do not force the rebuild of config files

Change-Id: Ic6bc2bc7177b1f266b9c0d1ccdfb925c1aa00d46
route: remove useless ipv6 header

Change-Id: I4cb0f232be6b7060e9a1bd66b4946060911405de
vi: try to insert utf8 at the right place

only check if we are inside an utf char for the moment

Change-Id: I60bbefcb1fa71e072a15c56985a53706ab53dc2e
Android.mk: toggle l-preview config flag