Disable arm-specific codepaths

Disable arm-specific codepaths

they cause the resulting code to come out with armv7 markers, which is
a problem given the way rust applications are statically linked.
 Changes in src and tests were made with the commands

 for file in `find src -name '*.rs'` ; do sed -i 's/target_arch = "arm"/target_arch = "armxxx"/g' $file ; done
 for file in `find tests -name '*.rs'` ; do sed -i 's/target_arch = "arm"/target_arch = "armxxx"/g' $file ; done

 Other changes were made manually.

Author: Peter Michael Green <plugwash@raspbian.org>

Gbp-Pq: Name disable-arm-specific-codepaths.patch