Fix "make checkdpadd" for lib/libc when MK_SSP != no

Add LIBSSP_NONSHARED to bsd.libnames.mk and append LIBSSP_NONSHARED to DPADD in
lib/libc when MK_SSP != no

Approved by: rpaulo (mentor)
MFC after: 3 days
Phabric: D675 (as part of a larger diff)
PR: 192728
Update these to make them actually compile!

Tested:

* cross compilation to MIPS