don't zero-initialization of bitifieds

there is problem with Clang 4.0 and Debug builds when bit field
initialization is used. depending on structure size we may get some bits
still set.
this bitfield comes from external component, so we don't have full
control over them. use of memset to clear structure is workaround

Change-Id: I35062517107fde37e503f1bf8909db856d566254

Author: ArturHarasimiuk

unit_tests/sku_info/sku_info_base_reference.h

@@ -27,7 +27,7 @@
 namespace OCLRT {
 struct SkuInfoBaseReference {
     static void fillReferenceFtrForTransfer(_SKU_FEATURE_TABLE &refFtrTable) {
-        refFtrTable = {};
+        memset(&refFtrTable, 0, sizeof(refFtrTable));
         refFtrTable.FtrStandardMipTailFormat = 1;
         refFtrTable.FtrULT = 1;
         refFtrTable.FtrEDram = 1;
@@ -46,7 +46,7 @@ struct SkuInfoBaseReference {
     }
 
     static void fillReferenceWaForTransfer(_WA_TABLE &refWaTable) {
-        refWaTable = {};
+        memset(&refWaTable, 0, sizeof(refWaTable));
         refWaTable.WaFbcLinearSurfaceStride = 1;
         refWaTable.WaDisableEdramForDisplayRT = 1;
         refWaTable.WaEncryptedEdramOnlyPartials = 1;