PR modula2/110631 Bugfix to FIO WriteCardinal

PR modula2/110631 Bugfix to FIO WriteCardinal

FIO.WriteCardinal fails to write binary data.  This patch fixes two
bugs in FIO.mod and provides a testcase which writes and reads binary
cardinals.  There was an off by one error when using HIGH (a) to
determine the number of bytes and the dest/src pointers were switched
when calling memcpy.

gcc/m2/ChangeLog:

	PR modula2/110631
	* gm2-libs/FIO.def (ReadAny): Correct comment as
	HIGH (a) + 1 is number of bytes.
	(WriteAny): Correct comment as HIGH (a) + 1 is number of
	bytes.
	* gm2-libs/FIO.mod (ReadAny): Correct comment as
	HIGH (a) + 1 is number of bytes.  Also pass HIGH (a) + 1
	to BufferedRead.
	(WriteAny): Correct comment as HIGH (a) + 1 is number of
	bytes.	Also pass HIGH (a) + 1 to BufferedWrite.
	(BufferedWrite): Rename parameter a to src, rename variable
	t to dest.  Correct parameter order to memcpy.

gcc/testsuite/ChangeLog:

	PR modula2/110631
	* gm2/pimlib/run/pass/testfiobinary.mod: New test.

Signed-off-by: Gaius Mulley <gaiusmod2@gmail.com>