[llvm] Auto-cleanup left-over file from earlier version of this test on bots

When this test was originally added in 991dfedfd738ce, it didn't pass
`-o` to to llc, causing llc to write a .s file to the source directory.
On the next run, lit would then try to run that as a test.
Make the test auto-cleanup that file for a while.

diff --git a/llvm/test/CodeGen/Generic/MIRDebugify/multifunction-module.mir b/llvm/test/CodeGen/Generic/MIRDebugify/multifunction-module.mir
index 27f9424..fe4fcc1 100644 (file)
--- a/llvm/test/CodeGen/Generic/MIRDebugify/multifunction-module.mir
+++ b/llvm/test/CodeGen/Generic/MIRDebugify/multifunction-module.mir
@@ -1,3 +1,5 @@
+# FIXME: Remove rm after a few weeks.
+# RUN: rm -f %S/multifunction-module.s
 # RUN: llc -run-pass=mir-debugify,mir-check-debugify -o - %s 2>&1 | FileCheck %s
 
 # CHECK: Machine IR debug info check: PASS