Results: Implement namespaced, type-safe results.

Because I was working on multiple things at once, this commit also:
- Adds wrappers for/linker flags to wrap CXX exceptions to make them
  abort. This saves ~0x8000 of memory in every system module.
- Broadly replaces lines of the pattern if (cond) { return ResultX; }
  with R_UNLESS(!cond, ResultX());.
- Reworks the R_TRY_CATCH macros (and the result macros in general).

stratosphere/libstratosphere/source/os/impl/os_waitable_manager_impl.cpp

@@ -98,13 +98,13 @@ namespace sts::os::impl{
         s32 index = WaitInvalid;
 
         R_TRY_CATCH(svcWaitSynchronization(&index, handles, count, timeout)) {
-            R_CATCH(ResultKernelTimedOut) { return WaitTimedOut; }
-            R_CATCH(ResultKernelCancelled) { return WaitCancelled; }
+            R_CATCH(svc::ResultTimedOut)  { return WaitTimedOut; }
+            R_CATCH(svc::ResultCancelled) { return WaitCancelled; }
             /* All other results are critical errors. */
-            /* 7601: Thread termination requested. */
-            /* E401: Handle is dead. */
-            /* E601: Handle list address invalid. */
-            /* EE01: Too many handles. */
+            /* svc::ResultThreadTerminating */
+            /* svc::ResultInvalidHandle. */
+            /* svc::ResultInvalidPointer */
+            /* svc::ResultOutOfRange */
         } R_END_TRY_CATCH_WITH_ASSERT;
 
         return index;