Problem: Android build helpers not in sync with LIBZMQ.
Problem: Android build helpers not in sync with LIBZMQ.

A few enhancements/code review/shellcheck fixes have been applied
recently to Android helpers in LIBZMQ. New helper functions, variables,
checks,... were added. All can be of interest for CZMQ, ZYRE but also for
any other zproject-generated ilbrary.

Solution: Report Android helper modifications in one shot from
LIBZMQ to ZPROJECT.

This concerns only the helpers. CI build scripts are not impacted
for new, as they may require more specific tests, but they will
follow the same soon.

Method:
- Manual report of LIBZMQ helper modifications to CZMQ & ZYRE.
- Check all still compile fine.
  --> This gives CZMQ & ZYRE "expected source tree".
- Report the modifications to ZPROJECT.
- Call GSL to generate CZMQ & ZYRE bindings.
- Diff between generated code and their "expected source tree".
- Check all still compile fine.

zeromq/zproject,zeromq/zproject,zeromq/zproject