Move libvpx from DEPS to src

third_party/libvpx/source/libvpx/vpx_ports/emms.asm

Index: third_party/libvpx/source/libvpx/vpx_ports/emms.asm
diff --git a/third_party/libvpx/source/libvpx/vpx_ports/emms.asm b/third_party/libvpx/source/libvpx/vpx_ports/emms.asm
new file mode 100644
index 0000000000000000000000000000000000000000..db8da287375206fad61ad631ba0abcb7c4f3709e
--- /dev/null
+++ b/third_party/libvpx/source/libvpx/vpx_ports/emms.asm
@@ -0,0 +1,38 @@
+;
+;  Copyright (c) 2010 The WebM 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.
+;
+
+
+%include "vpx_ports/x86_abi_support.asm"
+
+section .text
+global sym(vpx_reset_mmx_state) PRIVATE
+sym(vpx_reset_mmx_state):
+    emms
+    ret
+
+
+%if LIBVPX_YASM_WIN64
+global sym(vpx_winx64_fldcw) PRIVATE
+sym(vpx_winx64_fldcw):
+    sub   rsp, 8
+    mov   [rsp], rcx ; win x64 specific
+    fldcw [rsp]
+    add   rsp, 8
+    ret
+
+
+global sym(vpx_winx64_fstcw) PRIVATE
+sym(vpx_winx64_fstcw):
+    sub   rsp, 8
+    fstcw [rsp]
+    mov   rax, [rsp]
+    add   rsp, 8
+    ret
+%endif