Move unknown builtin name to shared

Signed-off-by: Mateusz Jablonski <mateusz.jablonski@intel.com>

shared/source/built_ins/CMakeLists.txt

@@ -14,6 +14,7 @@ set(NEO_CORE_SRCS_BUILT_INS
     ${CMAKE_CURRENT_SOURCE_DIR}/sip.cpp
     ${CMAKE_CURRENT_SOURCE_DIR}/sip.h
     ${CMAKE_CURRENT_SOURCE_DIR}/sip_kernel_type.h
+    ${CMAKE_CURRENT_SOURCE_DIR}${BRANCH_DIR_SUFFIX}unknown_built_in_name.cpp
 )
 
 add_subdirectory(builtinops)

shared/source/built_ins/unknown_built_in_name.cpp

@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) 2021 Intel Corporation
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ */
+
+#include "shared/source/built_ins/built_ins.h"
+
+namespace NEO {
+
+const char *getUnknownBuiltinAsString(EBuiltInOps::Type builtin) {
+    return "unknown";
+}
+} // namespace NEO