Replace output file name in test with %t

Author: scentini

lld/test/wasm/lto/incompatible.ll

@@ -1,6 +1,6 @@
 ; REQUIRES: x86
 ; RUN: llvm-as %s -o %t.bc
-; RUN: not wasm-ld %t.bc -o out.wasm 2>&1 | FileCheck %s
+; RUN: not wasm-ld %t.bc -o %t.wasm 2>&1 | FileCheck %s
 
 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
 target triple = "x86_64-unknown-linux-gnu"