[llvm] r296998 - [XRay] Allow logging the first argument of a function call.

[Martin Pelikán via llvm-commits]

>> Your change appears to cause an undefined symbol error when the test
>> cases are building on ppc64le.

>> /home/buildbots/ppc64le-clang-test/clang-ppc64le/llvm/projects/compiler-rt/lib/xray/xray_interface.cc:200:
>> undefined reference to `__xray::patchFunctionEntry(bool, unsigned int,
>> XRaySledEntry const&, void (*)())'

Yes, sorry.  This was fixed by D30634 and committed as soon as we
could when we realized the problem.  There's still the issue of
temporarily disabling tests for the unfinished implementations
(correctly) in D30635.  Apologies for the breakage.
-- 
Martin Pelikan