[SYCL][NFC] Temporarily disable sporadically failing test

The issue is tracked here: intel#1508

Signed-off-by: Alexey Bader <alexey.bader@intel.com>

Author: bader

sycl/test/basic_tests/buffer/buffer_dev_to_dev.cpp

@@ -1,3 +1,7 @@
+// The test fails sporadically on cuda.
+// See https://github.com/intel/llvm/issues/1508 for more details.
+// UNSUPPORTED: cuda
+
 // RUN: %clangxx -fsycl -fsycl-targets=%sycl_triple %s -o %t.out
 // RUN: env SYCL_DEVICE_TYPE=HOST %t.out
 // RUN: %CPU_RUN_PLACEHOLDER %t.out