Adding new functionality for SIMD optimizations in AEC3

webrtc/modules/audio_processing/BUILD.gn

Index: webrtc/modules/audio_processing/BUILD.gn
diff --git a/webrtc/modules/audio_processing/BUILD.gn b/webrtc/modules/audio_processing/BUILD.gn
index a57136a82e4aeb785f3fd14f84a6161587b0903a..5686dc66908dced9a188cb2929b8cf2ee035667d 100644
--- a/webrtc/modules/audio_processing/BUILD.gn
+++ b/webrtc/modules/audio_processing/BUILD.gn
@@ -94,6 +94,7 @@ rtc_static_library("audio_processing") {
     "aec3/suppression_filter.h",
     "aec3/suppression_gain.cc",
     "aec3/suppression_gain.h",
+    "aec3/vector_math.h",
     "aecm/aecm_core.cc",
     "aecm/aecm_core.h",
     "aecm/echo_control_mobile.cc",
@@ -601,6 +602,7 @@ if (rtc_include_tests) {
         "aec3/subtractor_unittest.cc",
         "aec3/suppression_filter_unittest.cc",
         "aec3/suppression_gain_unittest.cc",
+        "aec3/vector_math_unittest.cc",
         "audio_processing_impl_locking_unittest.cc",
         "audio_processing_impl_unittest.cc",
         "audio_processing_unittest.cc",