libvpx: Pull from upstream

source/libvpx/build/make/rtcd.pl

Index: source/libvpx/build/make/rtcd.pl
===================================================================
--- source/libvpx/build/make/rtcd.pl	(revision 292072)
+++ source/libvpx/build/make/rtcd.pl	(working copy)
@@ -49,7 +49,7 @@
 
 my %config = ();
 while (<CONFIG_FILE>) {
-  next if !/^CONFIG_/;
+  next if !/^(?:CONFIG_|HAVE_)/;
   chomp;
   my @pair = split /=/;
   $config{$pair[0]} = $pair[1];
@@ -209,14 +209,16 @@
 #define RTCD_EXTERN extern
 #endif
 
+EOF
+
+process_forward_decls();
+print <<EOF;
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
 EOF
-
-process_forward_decls();
-print "\n";
 declare_function_pointers("c", @ALL_ARCHS);
 
 print <<EOF;
@@ -388,7 +390,7 @@
   @REQUIRES = filter(keys %required ? keys %required : qw/media/);
   &require(@REQUIRES);
   arm;
-} elsif ($opts{arch} eq 'armv8') {
+} elsif ($opts{arch} eq 'armv8' || $opts{arch} eq 'arm64' ) {
   @ALL_ARCHS = filter(qw/neon/);
   arm;
 } else {