Zero the buffer containing the .gnu_debuglink section before writing into it.  Prior to this commit the .gnu_debuglink section can have up to 3 bytes of uninitialized garbage; as a result, .ko files could change vary between builds.
Zero the buffer containing the .gnu_debuglink section before writing
into it.  Prior to this commit the .gnu_debuglink section can have up
to 3 bytes of uninitialized garbage; as a result, .ko files could
change vary between builds.

Approved by:	dim
MFC after:	7 days

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase