AC_EGREP_CPP and ansi C

[Harlan Stenn]

I suspect that AC_EGREP_CPP is using K&R mode instead of ANSI mode under
HP-UX.

I have a test that attempts to determine how the C compiler will catify
tokens and it's botching with CC=cc under HP-UX.

I can't easily test this now to be sure.  I'll see if I can find a way
to dig into this a bit.

Harlan