Allow for multiple defaults in endianness and r16 in GFORTRAN_CONVERT_UNIT.

With this patch, it is possible to specify multiple defaults inthe
GFORTRAN_CONVERT_UNIT environment variable so that, for example, R16_IEEE
and BIG_ENDIAN can be specified together.

libgfortran/ChangeLog:

	* runtime/environ.c: Allow for multiple default values so that
	separate default specifications for IBM long double format and
	endianness are possible.
1 file changed