[SYCL] Fix handling of multiple usages of composite spec constants#2894

romanovvlad merged 4 commits intointel:syclintel/llvm:syclfrom

AlexeySachkov:private/asachkov/fix-composite-spec-constant-enumerationAlexeySachkov/llvm:private/asachkov/fix-composite-spec-constant-enumerationCopy head branch name to clipboard