Move sys/test to Yellowstone init process.

sys/yellowstone/yellowstone.cpp

@@ -0,0 +1,13 @@
+#include <mammoth/debug.h>
+#include <mammoth/process.h>
+#include <zcall.h>
+
+uint64_t main() {
+  dbgln("Yellowstone Initializing.");
+  uint64_t vaddr;
+  check(ZAddressSpaceMap(Z_INIT_VMAS_SELF, 0, Z_INIT_BOOT_VMMO, &vaddr));
+  check(SpawnProcessFromElfRegion(vaddr));
+
+  dbgln("Yellowstone Finished Successfully.");
+  return 0;
+}