[NFC] Fix test to avoid potential race with other sycl-post-link tests

Change test to not use %T which may cause case conditions with other
tests from the same directory.

Signed-off-by: Sergey Dmitriev <[email protected]>

Author: sndmitriev

llvm/test/tools/sycl-post-link/erase_used.ll

@@ -1,9 +1,9 @@
 ; This test checks that the post-link tool does not add "llvm.used" global to
 ; the output modules when splitting kernels.
 ;
-; RUN: sycl-post-link -split=kernel -S %s -o %T/files.table
-; RUN: FileCheck %s -input-file=%T/files_0.ll
-; RUN: FileCheck %s -input-file=%T/files_1.ll
+; RUN: sycl-post-link -split=kernel -S %s -o %t.files.table
+; RUN: FileCheck %s -input-file=%t.files_0.ll
+; RUN: FileCheck %s -input-file=%t.files_1.ll
 
 target triple = "spir64-unknown-unknown-sycldevice"