[PATCH] PR modula2/121164 Modula 2 build failure

This patch fixes the 2nd parameter name mismatch in
ARRAYOFCHAR.mod.

gcc/m2/ChangeLog:

	PR modula2/121164
	* gm2-libs/ARRAYOFCHAR.mod (Write): Rename 2nd parameter
	name a to str.

(cherry picked from commit 22d8b89689769e5efefd2c4e6dda88d9f0b2a945)

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