libgfortran: Fix namelist read.

	PR libfortran/107068

libgfortran/ChangeLog:

	* io/list_read.c (read_logical): When looking for a possible
	variable name, check for left paren, indicating a possible
	array reference.

gcc/testsuite/ChangeLog:

	* gfortran.dg/pr107068.f90: New test.