tests: use -no-install libtool flag to avoid ./lt-* scripts
tests: use -no-install libtool flag to avoid ./lt-* scripts

This ensures that the rpath of the generated binaries is set to use only
the just-compiled so-files and not any system-wide installed libraries
while avoiding the ugly shell script wrapper.

Change-Id: Idd458471069ef8912704cc7602c6e8c71c0b62be

osmocom/libosmo-abis,osmocom/libosmo-abis,osmocom/libosmo-abis