Msys2 Makefile.meson: Add exchndl.dll to installer packages
Meson built msys2 installer packages warn "exchndl.dll could not be loaded, no crash debugger". Unlike autotools installer packages, we don't currently include it in meson builds. We should.
Meson built msys2 installer packages warn "exchndl.dll could not be loaded, no crash debugger". Unlike autotools installer packages, we don't currently include it in meson builds. We should.