[libmodutils] Don't build libmodutils by default.

The static library isn't actually used by ModLoader, and we're
not going to include a static library in the distribution, since
it would only work with the same version of the compiler.
Initial packaging functionality using CPACK.

CMakeLists.txt: Added CPACK information.

cmake/platform/msvc.cmake: Always generate debugging symbols.

src/SADXModLoader/CMakeLists.txt: Make sure the PDB file
is installed in the correct place.

include/: Install headers.
Clean up some overzealous CFLAGS usage.

- CMakeLists.txt: Don't set CMAKE_C_FLAGS_* etc. here.
  It's already set in cmake/platform.cmake.

- cmake/platform.cmake: Append to the CMAKE_C_FLAGS_* variables
  instead of replacing them.
  - Same for src/*/CMakeLists.txt.

- cmake/platform/msvc.cmake:
  - Remove CFLAGS that are already set by CMake's platform
    configuration files.
  - Added -incremental:no to EXE linker flags.
[libmodutils] CMakeLists.txt: Added the PDB rules from SADXModLoader.

Renamed the target to modutils, since libmodutils.lib is redundant,
and if I ever fix up the code enough to compile with MinGW, it would
end up being named liblibmodutils.a, which is super redundant.
[include] CMakeLists.txt: Actually commit this to the repository.

Yet again, another file that I forgot to add to git. Whoops.
[include] CMakeLists.txt: Project is "include", not "data".

Copypasta from GCN MemCard Recover.
CMakeLists.txt: Set CPACK_PACKAGE_FILE_NAME.

The default CPACK_PACKAGE_FILE_NAME appends "-win32" to the
ZIP file, which is unnecessary because SADX Mod Loader only
runs on Windows.