Implement SVC 0x3B (GetThreadContext)

src/core/kernel/kernel.cpp

@@ -66,6 +66,7 @@ void Kernel::serviceSVC(u32 svc) {
 		case 0x38: getResourceLimit(); break;
 		case 0x39: getResourceLimitLimitValues(); break;
 		case 0x3A: getResourceLimitCurrentValues(); break;
+		case 0x3B: getThreadContext(); break;
 		case 0x3D: outputDebugString(); break;
 		default: Helpers::panic("Unimplemented svc: %X @ %08X", svc, regs[15]); break;
 	}