Update libx264 to snapshot 20170623

Signed-off-by: Daniel Engberg <daniel.engberg.lists@pyret.net>

None of the CPUs supported in OpenWrt/LEDE are MSA capable (requires
MIPS32r5/r6 for that) which would lead to this error during configure:

You specified a pre-MSA CPU in your CFLAGS.
If you really want to run on such a CPU, configure with --disable-asm.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

Signed-off-by: Ted Hess <thess@kitschensync.net>

Introduce blacklist for CPU_TYPEs without ASM support in libx264
Add libpthread dependency required on non-musl builds

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

Signed-off-by: Ted Hess <thess@kitschensync.net>

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

--disable-asm isn't enough to disable building assembly code on ARM.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

Signed-off-by: Daniel Golle <daniel@makrotopia.org>

minor cleanup of CFLAGS, remove COPTS warnings
	yasm needs to be added to x86 toolchain
	(LEDE updated: c08651226f)

Signed-off-by: Daniel Golle daniel@makrotopia.org
Signed-off-by: Ted Hess <thess@kitschensync.net>

Signed-off-by: Adrian Panella <ianchi74@outlook.com>

libx264: create package

Signed-off-by: Adrian Panella <ianchi74@outlook.com>

add BUILD_PATENTED