- Return zero for file sizes of ELF types that have a variable size. - Neaten a few comments.
- Return zero for file sizes of ELF types that have a variable size.
- Neaten a few comments.

Obtained from:	elftoolchain
MFC after:		1 month

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