DSP: Added stub for ReadPipeIfPossible.

Kernel/Mutex: Properly lock the mutex when a thread enters it

CFG:U: Store country codes as u16 instead of char pointers, and return the correct error in GetCountryCodeID

CFG:U: Store country codes as u16 instead of char pointers, and return the correct error in GetCountryCodeID.

Fix gsp synch

Explicitly specify LE strings to iconv, fixes paths in Steel Diver

Remove unused NDMA module.

Pica debugger improvements

The affected code is no longer limited by compiler support on that platform.

This better reflects that no commands are supposed to show up until you hit the button a second time.

Double-clicking a texture parameter command in the pica command lists will spawn these as a new tab in the pica command list dock area.

The texture viewer is enabled when selecting a write command to one of the texture config registers.

Changed start/stop button to reflect current tracing status.
Properly labeled column headers.

This class has a few advantages over the regular QSpinBox:
- QSpinBox stores its as signed 32 bit integers, which for instance is unsuitable for representing memory addresses. CSpinBox uses 64 bit integers instead.
- QSpinBox does not provide an easy way to handle number input from bases different than 10.
- QSpinBox is quite inflexible in general and almost any sort of customization requires reimplementing it anyway.

Log the cmd_buff arguments when citra comes across an unimplemented function

Thread: Fixed to wait on address when in arbitration.

MemMap: Updated memory map to subtract base address instead of mask.

Fix emulation of SASX and SSAX instructions.

Loader: Add 3DSX support

Kernel/File: Fixed file read/write hwtests

Make OpenDirectory fail if the directory doesn't exist

The 3DS allows the user to read from files opened with the Write access modifier, even if he did not specify the Read access modifier.

Open the files in binary mode so that we can prevent CR/LF problems in Windows, where a line-end is replaced by these two bytes instead of just 0xA, this was causing problems with the GetSize test