Add Android.mk for google-benchmark.

Change-Id: I67706c44cb46b0acb899f547dc802024d332fce9
diff --git a/Android.mk b/Android.mk
new file mode 100644
index 0000000..8d4ebf0
--- /dev/null
+++ b/Android.mk
@@ -0,0 +1,56 @@
+#
+# Copyright (C) 2016 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+LOCAL_PATH := $(call my-dir)
+
+google_benchmark_c_flags := \
+  -no-integrated-as \
+  -DBENCHMARK_ANDROID \
+  -DHAVE_POSIX_REGEX \
+
+google_benchmark_src_files := \
+  src/benchmark.cc \
+  src/colorprint.cc \
+  src/commandlineflags.cc \
+  src/console_reporter.cc \
+  src/csv_reporter.cc \
+  src/json_reporter.cc \
+  src/log.cc \
+  src/reporter.cc \
+  src/re_posix.cc \
+  src/sleep.cc \
+  src/string_util.cc \
+  src/sysinfo.cc \
+  src/walltime.cc \
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := libgoogle-benchmark
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
+LOCAL_CFLAGS := $(google_benchmark_c_flags)
+LOCAL_CPP_EXTENSION := .cc
+LOCAL_SRC_FILES := $(google_benchmark_src_files)
+LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
+include $(BUILD_STATIC_LIBRARY)
+
+include $(CLEAR_VARS)
+LOCAL_MODULE := libgoogle-benchmark
+LOCAL_MODULE_HOST_OS := linux
+LOCAL_C_INCLUDES := $(LOCAL_PATH)/include
+LOCAL_CFLAGS := $(google_benchmark_c_flags)
+LOCAL_CPP_EXTENSION := .cc
+LOCAL_SRC_FILES := $(google_benchmark_src_files)
+LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
+include $(BUILD_HOST_STATIC_LIBRARY)