pa_func_attributes.m4: better messages
pa_func_attributes.m4: better messages

It is a bit confusing when the alloc_size attribute is tested for more
than once, to include the arguments in the output message.

Signed-off-by: H. Peter Anvin (Intel) <8a453bad9912ffe59bc0f0b8abe03df9be19379e@zytor.com>

techkey/nasm,techkey/nasm,techkey/nasm,techkey/nasm,techkey/nasm