Some of the function definitions used K&R style definitions (but not all).
This just moves them all to be ANSI C

Bootstrapped and tested on x86_64-linux-gnu.

libiberty/ChangeLog:

	* testsuite/test-demangle.c (get_line): Change K&R style
	definition into ANSI C90 definitions.
	(fail): Likewise.
	(main): Likewise.

Signed-off-by: Andrew Pinski <quic_apinski@quicinc.com>