Add dependency on python3 modules required for arm64 binman use

Signed-off-by: Martyn Welch <martyn.welch@collabora.com>

debian/control

@@ -27,6 +27,8 @@ Build-Depends-Arch:
  lzop [armhf],
  lzop [arm64] <!cross> | lzop:native [arm64] <cross>,
  opensbi (>= 1.3) [riscv64],
+ python3-jsonschema [arm64],
+ python3-yaml [arm64],
  srecord [arm64] <!cross> | srecord:native [arm64] <cross>,
  uuid-dev,
  uuid-dev:native [arm64],