Bug 1766646 - Vendor libwebrtc from db622c359b - moz.build file updates

CLOBBER

@@ -22,5 +22,5 @@
 # changes to stick? As of bug 928195, this shouldn't be necessary! Please
 # don't change CLOBBER for WebIDL changes any more.
 
-Modified build files in third_party/libwebrtc - Bug 1766646 - Vendor libwebrtc from 5831afb832
+Modified build files in third_party/libwebrtc - Bug 1766646 - Vendor libwebrtc from db622c359b
 

third_party/libwebrtc/rtc_base/synchronization/mutex_gn/moz.build

@@ -28,6 +28,10 @@ LOCAL_INCLUDES += [
     "/tools/profiler/public"
 ]
 
+UNIFIED_SOURCES += [
+    "/third_party/libwebrtc/rtc_base/synchronization/mutex.cc"
+]
+
 if not CONFIG["MOZ_DEBUG"]:
 
     DEFINES["DYNAMIC_ANNOTATIONS_ENABLED"] = "0"
@@ -129,6 +133,10 @@ if CONFIG["CPU_ARCH"] == "aarch64":
 
 if CONFIG["CPU_ARCH"] == "arm":
 
+    CXXFLAGS += [
+        "-mfpu=neon"
+    ]
+
     DEFINES["WEBRTC_ARCH_ARM"] = True
     DEFINES["WEBRTC_ARCH_ARM_V7"] = True
     DEFINES["WEBRTC_HAS_NEON"] = True