- 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)

Clean up our ARM assembly:

MFC 275256:

Switch to the ARM unified assembly language as the clang integrated as only
supports it. Binutils supports it when the ".syntax unified" directive
is set.

Sponsored by: ABT Systems Ltd

MFC 275264:

Update _ENTRY to use _EENTRY to reduce the common code.

MFC 275321:

Remove extra labels, ENTRY_NP already provides them.

Sponsored by: ABT Systems Ltd

MFC 275322:

Correctly a few incorrect uses of ENTRY/EENTRY and END/EEND

Sponsored by: ABT Systems Ltd

MFC 275416:

Fix the name of the coprocessor to include the "p" prefix, the clang
integrated assembler expects this.

Sponsored by: ABT Systems Ltd

MFC 275418:

Switch to unified syntax so these can be built with clang 3.5.

Sponsored by: ABT Systems Ltd

MFC 275519:

Add missing END macros to some of the xscale functions.

Sponsored by: ABT Systems Ltd

MFC 275520:

Use the unified syntax in a few more assembly files

Sponsored by: ABT Systems Ltd

MFC 275521:

Set the alignment to 4-bytes after a string as clang 3.5 can switch to
thumb mode if this is incorrect.

Sponsored by: ABT Systems Ltd

MFC 275522:

Place the literal pool after a RET otherwise clang 3.5 tries to put it too
far away from a ldr psuedo instruction. With this clang will place the
literal value here where it's close enough to be loaded.

Sponsored by: ABT Systems Ltd

MFC 275523:

Switch to an armv6k cpu, without this clang 3.5 complains "bx lr" is
unsupported as it needs a newer cpu.

Sponsored by: ABT Systems Ltd

MFC 275524:

Switch to a .cpu directive. These will work when clang 3.5 is imported
where the .arch directive is a nop.

Sponsored by: ABT Systems Ltd

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

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

Gateworks Avila board support:
o ixp425 support
o NPE network driver (requires Intel microcode)
o h/w qmgr support
o True IDE compact flash over expansion bus
o pci (ath and hifn795x parts tested)
o xscale watchdog timer
o ds1672 RTC on i2c bus
o ad7418 voltage + temp monitoring on i2c bus
o uart

Work done together with cognet, kevlo, and jmg. Parts of
the ixp425 support obtaine/derived from netbsd.

Reviewed by: cognet, imp
MFC after: 1 month