* pygnulib/GLEmiter.py (_eliminate_NMD_from_line): New private function
to remove @NMD@ occurrences from the line of an Automake snippet.
(_eliminate_NMD): New private function which uses
_eliminate_NMD_from_line on each line of the Automake snippet.
(GLEmiter.lib_Makefile_am, GLEmiter.tests_Makefile_am): Use
_eliminate_NMD on the Automake snippet.