Utilize LTLIBINTL for universal libintl handling
LTLIBINTL is created by configure and takes account of the invoker's specification regarding the location of libintl.so if it exists, or if the functionality should be found in libc. This merge request adds $(LTLIBINTL) to what to a first-time contributor would seem to be the appropriate places without disturbing the structure of Makefile.am.
See https://github.com/spack/spack/pull/38646 and https://github.com/spack/spack/pull/38650
Edited by Chris Green