Remove a superfluous echo in the emulator Makefile

It pollutes the output of silent rules.
stdlib: Fix map type listing
Merge branch 'egil/maps-fix-src-listing'

* egil/maps-fix-src-listing:
  stdlib: Fix map type listing
Merge branch 'nox/remove-superfluous-echo'

* nox/remove-superfluous-echo:
  Remove a superfluous echo in the emulator Makefile