Import aom library

This is the reference implementation for the Alliance for Open Media's av1 video code.

The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36.

third_party/aom/solution.mk

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+##
+## Copyright (c) 2016, Alliance for Open Media. All rights reserved
+##
+## This source code is subject to the terms of the BSD 2 Clause License and
+## the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+## was not distributed with this source code in the LICENSE file, you can
+## obtain it at www.aomedia.org/license/software. If the Alliance for Open
+## Media Patent License 1.0 was not distributed with this source code in the
+## PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+##
+
+
+# libaom reverse dependencies (targets that depend on libaom)
+AOM_NONDEPS=$(addsuffix .$(VCPROJ_SFX),aom gtest)
+AOM_RDEPS=$(foreach vcp,\
+              $(filter-out $(AOM_NONDEPS),$^), --dep=$(vcp:.$(VCPROJ_SFX)=):aom)
+
+aom.sln: $(wildcard *.$(VCPROJ_SFX))
+	@echo "    [CREATE] $@"
+	$(SRC_PATH_BARE)/build/make/gen_msvs_sln.sh \
+            $(if $(filter aom.$(VCPROJ_SFX),$^),$(AOM_RDEPS)) \
+            --dep=test_libaom:gtest \
+            --ver=$(CONFIG_VS_VERSION)\
+            --out=$@ $^
+aom.sln.mk: aom.sln
+	@true
+
+PROJECTS-yes += aom.sln aom.sln.mk
+-include aom.sln.mk
+
+# Always install this file, as it is an unconditional post-build rule.
+INSTALL_MAPS += src/%     $(SRC_PATH_BARE)/%
+INSTALL-SRCS-yes            += $(target).mk