www/{*chromium,iridium}: unbreak arm64 relocation in bundled ffmpeg

enable support for the .data.rel.ro section because the arm64
assembly code in ffmpeg depends on it

PR:	273349

www/chromium/files/patch-third__party_ffmpeg_configure

+--- third_party/ffmpeg/configure.orig	2023-08-27 17:50:08 UTC
++++ third_party/ffmpeg/configure
+@@ -5542,6 +5542,7 @@ case $target_os in
+         disable symver
+         ;;
+     freebsd)
++        enable section_data_rel_ro
+         ;;
+     bsd/os)
+         add_extralibs -lpoll -lgnugetopt

www/iridium/files/patch-third__party_ffmpeg_configure

+--- third_party/ffmpeg/configure.orig	2023-08-27 17:50:08 UTC
++++ third_party/ffmpeg/configure
+@@ -5542,6 +5542,7 @@ case $target_os in
+         disable symver
+         ;;
+     freebsd)
++        enable section_data_rel_ro
+         ;;
+     bsd/os)
+         add_extralibs -lpoll -lgnugetopt

www/ungoogled-chromium/files/patch-third__party_ffmpeg_configure

+--- third_party/ffmpeg/configure.orig	2023-08-27 17:50:08 UTC
++++ third_party/ffmpeg/configure
+@@ -5542,6 +5542,7 @@ case $target_os in
+         disable symver
+         ;;
+     freebsd)
++        enable section_data_rel_ro
+         ;;
+     bsd/os)
+         add_extralibs -lpoll -lgnugetopt