autoconf: update ax_pthread.m4

from git://git.savannah.gnu.org/autoconf-archive.git
100644 blob d383ad5c6d6a5061370800bb1dc89b7a334c0638	m4/ax_pthread.m4

dd94691 AX_PTHREAD: add support for Clang
386b290 AX_PTHREAD: fix support for AIX
e40cfd6 AX_PTHREAD: improve support for AIX

Change-Id: Ic1f1edc656e4e917b88f151493147f650b94242f
Make it possible to avoid automagic dependencies

See
 https://wiki.gentoo.org/wiki/Project:Quality_Assurance/Automagic_dependencies
for more info.
This patch makes it possible to request several dependencies not to be
used even if they are present on the system.

Change-Id: Ib32f60c001ade01eda3e89463279725ee4243ca2
disable NEON for arm64 platform

The registers and instructions are quite different to 32bit
and the assembly code needs a rewrite.

more info: http://people.linaro.org/~rikuvoipio/aarch64-talk/

Change-Id: Id75dbc1b7bf47f43a426ba2831f25bb8fa252c4f
Merge "Make it possible to avoid automagic dependencies"
update .gitignore

- generalize *.pc for libwebp(mux|demux)
- add auto-generated mkinstalldirs

Change-Id: I7543209722d6b64830fa61f88eccf54165920cc4
Merge "autoconf: update ax_pthread.m4"
always use fast-analysis for all methods.

This makes the segmentation overall less prone to
local-optimum  or boundary effect.

(and overall, encoding is a little faster)

Change-Id: I35688098b0f43c28b5cb81c4a92e1575bb0eddb9
decode mt+incremental: fix segfault in debug builds

VP8GetThreadMethod() may be called with a NULL headers param; correct an
assert.

broken since:
8a2fa09 Add a second multi-thread method

Change-Id: If7b6d1b8f4ec874d343a806cee5f5e6bb6438620
MIPS: MIPS32r1: Optimization of function WebPRescalerExportRow. [2/6]

Change-Id: I420e646deefac5df9a8dcec3b02da8dff02b1167
Merge "MIPS: MIPS32r1: Optimization of function WebPRescalerExportRow. [2/6]"
parse one row of intra modes altogether

(instead of per-macroblock)

speed unchanged.
simplified the context-saving for incremental decoding

Change-Id: I301be581bab581ff68de14c4ffe5bc0ec63f34be
MIPS: MIPS32r1: Optimization of function WebPRescalerImportRow. PATCH [3/6]

Change-Id: I32339a8d2d03f1a8d8638563d2b2c9e3a13a4909
MIPS: MIPS32r1: Optimization of function TransformOne. PATCH [4/6]

Change-Id: I5b98e2de940977538cf91bfa2128f4d1daa5c170