...at least macOS doesn't like that; change from OSL_TRACE (effectively doing
nothing unless running a debug build with SAL_LOG=+INFO) to SAL_INFO (calling
std::stringstream -> malloc in debug builds, regardless of SAL_LOG env var) in
a005fbed "OSL_TRACE->SAL in framework..sal" made
the mistake obvious.

Change-Id: I43d35524a0861998a1ef58c6f448085a2fb01cd5