powerpc: assume that the MPW assembler supports 8 byte alignments. (based on some inconclusive internet search it should, but this is not confirmed)

git-svn-id: trunk@36881 -

compiler/powerpc/agppcmpw.pas

@@ -788,6 +788,7 @@ interface
                    1:writer.AsmWriteLn(#9'align 0');
                    2:writer.AsmWriteLn(#9'align 1');
                    4:writer.AsmWriteLn(#9'align 2');
+                   8:writer.AsmWriteln(#9'align 3');
                    otherwise internalerror(2002110302);
                  end;
               end;