sysctl: Add missing NET_IPV6_ACCEPT_RA_PREFIX_ROUTE definition

Change-Id: I82793c23094c4a498242e72ec100e6a9e0d16d45
misc: Fix compilation under GCC 4.7

Change-Id: Iddd9f528d168d440b532f0db551c3b6f58fa05ce
Signed-off-by: Rohan Mathur <rohanmathur34@gmail.com>
htc: add include/mach folder in htc subfolder, and create htc_inc that will hold htc-specific functions prototypes
htc: add hr_msleep implementation