Merge "Fixed androidmk crash when parsing external/aac/Android.mk"

androidmk/cmd/androidmk/androidmk.go

@@ -261,9 +261,11 @@ func handleAssignment(file *bpFile, assignment *mkparser.Assignment, c *conditio
 		default:
 			var val bpparser.Expression
 			val, err = makeVariableToBlueprint(file, assignment.Value, bpparser.ListType)
+			if err == nil {
 				err = setVariable(file, appendVariable, prefix, name, val, false)
 			}
 		}
+	}
 	if err != nil {
 		file.errorf(assignment, err.Error())
 	}