[XRay] [compiler-rt] Mark arg1 logging test as failing on !x86_64.
Summary:
rL297000 and rL297003 implemented arg1 logging on amd64 and made
other architectures build.  We need to blacklist the new test as well.
Reviewers: dberris, timshen
Subscribers: sdardis, llvm-commits
// RUN: rm arg1-logger-*
//
// At the time of writing, the ARM trampolines weren't written yet.
-// XFAIL: arm || aarch64
+// XFAIL: arm || aarch64 || mips
// See the mailing list discussion of r296998.
// UNSUPPORTED: powerpc64le
