Support for Signal calls.

Merge in RedPhone

// FREEBIE

jni/webrtc/modules/audio_processing/utility/Android.mk

@@ -0,0 +1,44 @@
+# Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
+#
+# Use of this source code is governed by a BSD-style license
+# that can be found in the LICENSE file in the root of the source
+# tree. An additional intellectual property rights grant can be found
+# in the file PATENTS.  All contributing project authors may
+# be found in the AUTHORS file in the root of the source tree.
+
+LOCAL_PATH := $(call my-dir)
+
+include $(CLEAR_VARS)
+
+include $(LOCAL_PATH)/../../../../android-webrtc.mk
+
+LOCAL_ARM_MODE := arm
+LOCAL_MODULE_CLASS := STATIC_LIBRARIES
+LOCAL_MODULE := libwebrtc_apm_utility
+LOCAL_MODULE_TAGS := optional
+LOCAL_SRC_FILES := \
+    fft4g.c \
+    ring_buffer.c \
+    delay_estimator.c \
+    delay_estimator_wrapper.c
+
+# Flags passed to both C and C++ files.
+LOCAL_CFLAGS := \
+    $(MY_WEBRTC_COMMON_DEFS)
+
+# Include paths placed before CFLAGS/CPPFLAGS
+LOCAL_C_INCLUDES := \
+    $(LOCAL_PATH) \
+    $(LOCAL_PATH)/../../.. \
+    $(LOCAL_PATH)/../../../common_audio/signal_processing/include \
+    $(LOCAL_PATH)/../../../..
+
+LOCAL_SHARED_LIBRARIES := \
+    libcutils \
+    libdl \
+    libstlport
+
+ifndef NDK_ROOT
+include external/stlport/libstlport.mk
+endif
+include $(BUILD_STATIC_LIBRARY)