Kernel/SVC: Partially implemented svcExitProcess.

Terminating processes with ready threads is not currently implemented and will assert. It is currently unknown how the 3DS kernel stops ready threads or threads running in another core.

src/core/hle/kernel/process.h

@@ -49,6 +49,8 @@ union ProcessFlags {
     BitField<12, 1, u16> loaded_high; ///< Application loaded high (not at 0x00100000).
 };
 
+enum class ProcessStatus { Created, Running, Exited };
+
 class ResourceLimit;
 struct MemoryRegionInfo;
 
@@ -122,6 +124,8 @@ public:
     u16 kernel_version = 0;
     /// The default CPU for this process, threads are scheduled on this cpu by default.
     u8 ideal_processor = 0;
+    /// Current status of the process
+    ProcessStatus status;
 
     /// The id of this process
     u32 process_id = next_process_id++;