libvpx: Pull from upstream

source/libvpx/build/make/rtcd.pl

 #!/usr/bin/env perl
 
 no strict 'refs';
 use warnings;
 use Getopt::Long;
 Getopt::Long::Configure("auto_help");
 
 my %ALL_FUNCS = ();
 my @ALL_ARCHS;
 my @ALL_FORWARD_DECLS;
@@ skipping 254 matching lines @@
 EOF
   common_bottom;
 }
 
 sub arm() {
   determine_indirection("c", @ALL_ARCHS);
 
   # Assign the helper variable for each enabled extension
   foreach my $opt (@ALL_ARCHS) {
     my $opt_uc = uc $opt;
+    # Enable neon assembly based on HAVE_NEON logic instead of adding new
+    # HAVE_NEON_ASM logic
+    if ($opt eq 'neon_asm') { $opt_uc = 'NEON' }
     eval "\$have_${opt}=\"flags & HAS_${opt_uc}\"";
   }
 
   common_top;
   print <<EOF;
 #include "vpx_config.h"
 
 #ifdef RTCD_C
 #include "vpx_ports/arm.h"
 static void setup_rtcd_internal(void)
@@ skipping 89 matching lines @@
   }
   close CONFIG_FILE;
   mips;
 } elsif ($opts{arch} eq 'armv5te') {
   @ALL_ARCHS = filter(qw/edsp/);
   arm;
 } elsif ($opts{arch} eq 'armv6') {
   @ALL_ARCHS = filter(qw/edsp media/);
   arm;
 } elsif ($opts{arch} eq 'armv7') {
-  @ALL_ARCHS = filter(qw/edsp media neon/);
+  @ALL_ARCHS = filter(qw/edsp media neon_asm neon/);
+  arm;
+} elsif ($opts{arch} eq 'armv8') {
+  @ALL_ARCHS = filter(qw/neon/);
   arm;
 } else {
   unoptimized;
 }
 
 __END__
 
 =head1 NAME
 
 rtcd -
@@ skipping 10 matching lines @@
 C header file on stdout.
 
 =head1 OPTIONS
 
 Options:
   --arch=ARCH       Architecture to generate defs for (required)
   --disable-EXT     Disable support for EXT extensions
   --require-EXT     Require support for EXT extensions
   --sym=SYMBOL      Unique symbol to use for RTCD initialization function
   --config=FILE     File with CONFIG_FOO=yes lines to parse