Correct sceKernelModuleStart() return value.
Fill the module info segment addresses and sizes.
Calculate the module info data/text/bss size.
Protect against modules with no start address.

Generally, fake ones.
Cleanup remaining modules on loadexec.
Clear module text and bss on unload.

Text is set to break instructions, data/bss to -1.  Matches results on a
PSP.
Return NOT_YET_LINKED for unlinked module funcs.
Warn on exports from syslib.

They don't seem to hook up properly on hardware by the module name.
Return an error code when module load fails.

If we're out of memory, we need to tell the game, of course.
Add a safety check for lots of segments.
Merge pull request #6549 from unknownbrackets/modules

Correct some module func return values, info values, and clear on unload