In Change-Id Idf5a861f4dacbec3c664f4ced6e03d8662c73112 we introduced
the use of libosmo-simtrace2 (from simtrace2.git). Our configure
script checks for it properly, but the debian/control wasn't updated.
Change-Id: I875f9d6d06d806fb9f9264840a65934fb0e99972