[lit] Fix order of checks in shtest-shell.py test

Summary:
An expectation in `utils/lit/tests/Inputs/shtest-shell/redirects.txt`
expects that first a string printed to stdout is seen, and then a
string printed to stderr. Add `flush()` calls to ensure that stdout is
printed before stderr, as expected.

Reviewers: rnk, mgorny, jroelofs

Reviewed By: rnk

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D35947

llvm-svn: 309292

1 files changed, 4 insertions, 0 deletions

diff --git a/llvm/utils/lit/tests/Inputs/shtest-shell/write-to-stderr.py b/llvm/utils/lit/tests/Inputs/shtest-shell/write-to-stderr.py
index aff94cd8b96..9463251d823 100644
--- a/llvm/utils/lit/tests/Inputs/shtest-shell/write-to-stderr.py
+++ b/llvm/utils/lit/tests/Inputs/shtest-shell/write-to-stderr.py
@@ -1,3 +1,7 @@
 #!/usr/bin/env python
+
 import sys
+
+
 sys.stderr.write("a line on stderr\n")
+sys.stderr.flush()