libvpx: Pull from upstream

libvpx: Pull from upstream

Current HEAD: 6f23d405821477ed857fd9cda3cdac6068aee490

git log from upstream:
c4367b9 vp9_resize_plane: quiet some static analysis warnings
388add9 vp9_fdct8x8_quant_ssse3: quiet a static analysis warning
198b039 vp9_fdct8x8_quant_sse2: quiet a static analysis warning
4283692 vp9_mv_pred: quiet a static analysis warning
6126afe Fix external resize memory issues.
08acc34 Remove last remnants of obj_int_extract
5370c6f Initialize "corrupted" to zero
83288c7 Order header files alphabetically
6a4e85a Add protection for codec interface name change.
c932584 Fix the C version of column vector projection
e521091 Update to variance partition.
c0423ab Refactor set vbp thresholds function
ed6824e Remove unused ZBIN_BOOST macros
1f841c3 Add frame parallel decode option to vpxdec.
4611f24 Remove duplicate clamping
c852200 Remove ineffective newmv skip checking from vp9_pick_inter_mode
981bb84 Simplify prediction filter search in rtc coding mode
2cfddec Refactor column integral projection computation
f2d682f change the order of inter modes evaluated
ea74c1d usage.dox: fix encoder/decoder subpage list indent
<...>

TBR=tomfinegan@chromium.org

Committed: https://chromium.googlesource.com/chromium/deps/libvpx/+/00cf1b1656d1669e1874fa8c70c493e2c3accad5

[Johann, 2015-03-19 14:05:11]

Committed patchset #1 (id:1) manually as
00cf1b1656d1669e1874fa8c70c493e2c3accad5 (presubmit successful).

[Tom Finegan, 2015-03-19 17:41:25]

On 2015/03/19 14:05:11, Johann wrote:
> Committed patchset #1 (id:1) manually as
> 00cf1b1656d1669e1874fa8c70c493e2c3accad5 (presubmit successful).

lgtm