[testsuite] Don't xfail gcc.dg/binop-xor1.c

[Richard Sandiford]

Hans-Peter Nilsson <hp@bitrange.com> writes:
> On Tue, 4 Feb 2014, Rainer Orth wrote:
>> AFAICT the gcc.dg/binop-xor1.c test is XPASSing everywhere since about
>> 20131114:
>
> Bah, missing analysis. "Everywhere" does not include cris-elf,
> powerpc64-unknown-linux-gnu, m68k-unknown-linux-gnu,
> s390x-ibm-linux-gnu, powerpc-ibm-aix7.1.0.0.

Based on this list I'm guessing it's another BRANCH_COST==1 thing,
so that we don't convert && and || into & and |?  There are a few other
similar tests that either XFAIL based on that or force a higher branch cost.

Thanks,
Richard