The asm in this port seems to have some x265 heritage.  So there is a
x86inc.asm file that we can patch.  But it uses yasm instead of nasm
and yasm doesn't know about endbr64.  So just dump the bytes for that
instruction into place.

Seems to be fix playing youtube vids in chromium again.

ok?


Index: multimedia/libvpx/Makefile
===================================================================
RCS file: /cvs/ports/multimedia/libvpx/Makefile,v
retrieving revision 1.54
diff -u -p -r1.54 Makefile
--- multimedia/libvpx/Makefile	8 Feb 2024 13:39:39 -0000	1.54
+++ multimedia/libvpx/Makefile	24 Feb 2024 17:29:40 -0000
@@ -6,7 +6,7 @@ GH_TAGNAME=	v1.13.1
 EPOCH=		0
 CATEGORIES=	multimedia
 
-REVISION=	1
+REVISION=	2
 
 SHARED_LIBS=	vpx	16.0
 
Index: multimedia/libvpx/patches/patch-third_party_x86inc_x86inc_asm
===================================================================
RCS file: multimedia/libvpx/patches/patch-third_party_x86inc_x86inc_asm
diff -N multimedia/libvpx/patches/patch-third_party_x86inc_x86inc_asm
--- /dev/null	1 Jan 1970 00:00:00 -0000
+++ multimedia/libvpx/patches/patch-third_party_x86inc_x86inc_asm	24 Feb 2024 17:29:40 -0000
@@ -0,0 +1,13 @@
+Index: third_party/x86inc/x86inc.asm
+--- third_party/x86inc/x86inc.asm.orig
++++ third_party/x86inc/x86inc.asm
+@@ -860,6 +860,9 @@ BRANCH_INSTR jz, je, jnz, jne, jl, jle, jnl, jnle, jg,
+     %endif
+     align function_align
+     %2:
++    %if VPX_ARCH_X86_64
++        dd 0xfa1e0ff3
++    %endif
+     RESET_MM_PERMUTATION        ; needed for x86-64, also makes disassembly somewhat nicer
+     %xdefine rstk rsp           ; copy of the original stack pointer, used when greater alignment than the known stack alignment is required
+     %assign stack_offset 0      ; stack pointer offset relative to the return address