Legal but unusual library name pattern (like libgctp):
	ELF library libpoints-2.0.0.so
	SONAME libpoints-2.0.0.so
	dev libpoints.so -> libpoints-2.0.0.so

Test:

(1) typical case. fortran_lib file defined, mod file defined
  should install correctly.
(2) `dh_fortran get_fc_env --save` should store a copy of fc_env in .debhelper
