String fix v2

Author: atirut-w

llvm/lib/Target/Z80/MCTargetDesc/Z80MCAsmInfo.cpp

@@ -48,7 +48,10 @@ Z80MCAsmInfoELF::Z80MCAsmInfoELF(const Triple &T) {
   if (Z80GasStyle) {
     Code16Directive = ".assume\tADL = 0";
     Code24Directive = ".assume\tADL = 1";
-    AsciiDirective = ByteListDirective = Data8bitsDirective = "\t.byte\t";
+    AsciiDirective = ByteListDirective = Data8bitsDirective = "\tdb\t";
+    Data16bitsDirective = "\tdw\t";
+    Data24bitsDirective = "\td24\t";
+    Data32bitsDirective = "\td32\t";
   } else {
     Code16Directive = "assume\tadl = 0";
     Code24Directive = "assume\tadl = 1";