[Offload] Enable check-offload in AMDGPU prod bot (#181)

This adds `check-offload` to the AMDGPU OpenMP Offloading production
buildbot, to re-enable coverage of OpenMP offload testing.

Author: jplehr

buildbot/osuosl/master/config/builders.py

@@ -1827,6 +1827,7 @@
                             "-DTEST_SUITE_SOLLVEVV_OFFLOADING_CFLAGS=-fopenmp-targets=amdgcn-amd-amdhsa;-Xopenmp-target=amdgcn-amd-amdhsa",
                             "-DTEST_SUITE_SOLLVEVV_OFFLOADING_LDLAGS=-fopenmp-targets=amdgcn-amd-amdhsa;-Xopenmp-target=amdgcn-amd-amdhsa",
                         ],
+                        add_lit_checks=['check-offload'],
                         add_openmp_lit_args=["--time-tests", "--timeout 100"],
                     )},