endeavoru: build correctly on OS X (attempt #2)

Not sure why -march=armv7-a+sec is not added by the Makefile.

/Volumes/Data/hudson/workspace/recovery/cm-11.0/kernel/htc/endeavoru/arch/arm/mach-tegra/sleep.S: Assembler messages:
/Volumes/Data/hudson/workspace/recovery/cm-11.0/kernel/htc/endeavoru/arch/arm/mach-tegra/sleep.S:470: Error: selected processor does not support ARM mode `smc #0'
/Volumes/Data/hudson/workspace/recovery/cm-11.0/kernel/htc/endeavoru/arch/arm/mach-tegra/sleep.S:489: Error: selected processor does not support ARM mode `smc #0'

Change-Id: Id2d60007018fe10429c2031f1ef44c78cd265bc1