gdbstub implementation

GPU/Loaders: Log an error when a loader tries to load from a component beyond the available ones

GPU/Loaders: Log an error when a loader tries to load from a component beyond the available ones (12).

Related to #1170

pkgbuild is now provided by Travis itself, so homebrew throws
an error upon trying to install it.

CMake recently 302'd the download URL we're using.
To prevent any issues, just follow the redirect with cURL.

Added CSND_ExecuteType0Commands stub.

Implement FS_User::GetFreeBytes

Add GetTotalStepCount Stub

citra-qt: Change file path encoding

GLSL Fragment Shader Generation

- Also add a comment to AppendColorCombiner.

- Includes a check to confirm no hash collisions.

- Fixes uniform issue on AMD.

- Alpha testing is not done with float32 precision, this makes the HW renderer match the SW renderer.