- Copy stable/10@296371 to releng/10.3 in preparation for 10.3-RC1
builds.
- Update newvers.sh to reflect RC1.
- Update __FreeBSD_version to reflect 10.3.
- Update default pkg(8) configuration to use the quarterly branch.

Approved by: re (implicit)

MFC r269390: Fix unwind info in hand-written asm (avoid nested functions).

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Add END to ARM libkern assembly functions

Add the required __aeabi_* functions the kernel uses when built for ARM EABI

/* -> /*- for copyright notices, minor format tweaks as necessary

Use the RET macro.

Don't attempt to profile __udivsi3() and friends, as mcount() uses them.

Import libkern arm specific bits.