selftests/vm/.gitignore: add mremap_dontunmap

Add mremap_dontunmap to .gitignore.

Fixes: 0c28759 ("selftests: add MREMAP_DONTUNMAP selftest")
Signed-off-by: John Hubbard <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Cc: Kirill A. Shutemov <[email protected]>
Cc: Brian Geffon <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Linus Torvalds <[email protected]>

Author: johnhubbard

tools/testing/selftests/vm/.gitignore

@@ -6,6 +6,7 @@ map_populate
 thuge-gen
 compaction_test
 mlock2-tests
+mremap_dontunmap
 on-fault-limit
 transhuge-stress
 userfaultfd