Initialize symbol name in symbol table. Was causing run to run differences in bin file

generated.

Change-Id: I4b31da12d3c58d91a9b90a2a5903aa2998bcef9c

Author: shruthi-hp

IGC/Compiler/CISACodeGen/CISABuilder.cpp

@@ -4792,6 +4792,7 @@ namespace IGC
                 IGC_ASSERT(name.size() <= vISA::MAX_SYMBOL_NAME_LENGTH);
 
                 vISA::GenSymEntry sEntry;
+                memset(sEntry.s_name, '0', vISA::MAX_SYMBOL_NAME_LENGTH);
                 strcpy_s(sEntry.s_name, vISA::MAX_SYMBOL_NAME_LENGTH, name.str().c_str());
                 MDNode* md = pGlobal->getMetadata("ConstSampler");
                 if (md)