Debian: re-introduce missing build dependency to libssl-dev

In Change-Id  I469909ad7c597cde3d7a7d2ec86101a9f41d3aa6 we accidentially
also removed the libssl-dev dependency.  osmo-bsc_nat still uses
RAND_getbytes directly, so we have to keep it for now, until we switch
to a future libosmocore-based mechanism that's in the works.

Change-Id: I3be26c566baf05278ba51b835a72e14ce6ecf3d0
1 file changed