Dynamic PRX libraries for PSP.

Include whichever PRX you need into your homebrew and link against the stubs version (i.e. libpng_stub instead of libpng). Either use load/start module routines, or use utility module loading (on ARK-4 and above).

Dynamic libraries provide a few advantages compared to their statically linked counterparts, such as:

• Allows to load and offload the code on-demand, providing better memory management (the library is only loaded in RAM when actually needed).
• Allows for homebrew to be modular.
• Allows the PRX library to be updated (i.e. for bug fixes) without having to recompile the homebrew that uses it.
• Allows for various homebrew to share the same binaries.