The test (MatrixTranspose) and the tracer tool both write to stdout
which sometime causes a trace corruption.
Change the test to emit info messages to stderr instead of stdout,
leaving stdout for the tracer tool's exclusive use.
Change-Id: I18047dbcd9039b70dd24ef6e7e8e9d89b40bedd2
[ROCm/roctracer commit: bbe1db3810]