[SYCL] Retain build-log when program build failed

[bso-intel]

We should retain the build log when the program build failed. The build log is retrieved by SYCL RT.

[smaslov-intel]

Is there no build-log leak similar to what you were fixing for module leak?
Please also add a test that catches build-log being reported upon failed module build

[bso-intel]

Is there no build-log leak similar to what you were fixing for module leak?

Yes, this will result in a memory leak since a sycl::program is not created when L0 fails to build it.
So, RT never calls piProgramRelease().
Not sure how we can avoid this memory leak.

[smaslov-intel]

Is there no build-log leak similar to what you were fixing for module leak?

Yes, this will result in a memory leak since a sycl::program is not created when L0 fails to build it. So, RT never calls piProgramRelease(). Not sure how we can avoid this memory leak.

Hmm. I see SYCL RT (expectedly) calling piProgramGetBuildInfo after the program build fails, so there must be a PI program to call it.

[bso-intel]

It seems these are known failures that are irrelevant to my patch in this PR.
Failed Tests (1):
SYCL :: AtomicRef/atomic_memory_order_acq_rel.cpp
Failed Tests (1):
SYCL :: GroupAlgorithm/reduce_sycl2020.cpp

[bso-intel]

@intel/llvm-gatekeepers , please merge.