debian: Move qemu-system-arm from Build-Depends to Build-Depends-Indep

This package is only used in testing the qemu arm build, which is in
the arch all package.

Signed-off-by: Keith Packard <keithp@keithp.com>

debian/control

@@ -5,10 +5,10 @@ Maintainer: Keith Packard <keithp@keithp.com>
 Homepage: https://keithp.com
 Rules-Requires-Root: no
 Build-Depends: debhelper-compat (= 13), libreadline-dev,
- python3, lola, gawk, asciidoctor, ruby-asciidoctor-pdf, ruby-coderay, qemu-system-arm,
+ python3, lola, gawk, asciidoctor, ruby-asciidoctor-pdf, ruby-coderay,
  black
 Build-Depends-Indep: avr-libc, gcc-avr,
- binutils-arm-none-eabi, gcc-arm-none-eabi, picolibc-arm-none-eabi (>= 1.4),
+ binutils-arm-none-eabi, gcc-arm-none-eabi, picolibc-arm-none-eabi (>= 1.4), qemu-system-arm,
  binutils-riscv64-unknown-elf, gcc-riscv64-unknown-elf, picolibc-riscv64-unknown-elf (>= 1.4),
  gcc-arm-linux-gnueabi, libc6-dev-armel-cross
 Standards-Version: 4.5.0