config: fix compilation with FLB_HAVE_STATIC_CONF

Fixes the following compilation error:

```
/tmp/fluent-bit/src/fluent-bit.c:607:10: error: label at end of compound statement
     case SIGHUP:
          ^~~~~~
```

Signed-off-by: Bryce Gibson <[email protected]>

src/fluent-bit.c

@@ -604,8 +604,8 @@ static void flb_signal_handler(int signal)
     case SIGCONT:
         flb_dump(ctx->config);
         break;
-    case SIGHUP:
 #ifndef FLB_HAVE_STATIC_CONF
+    case SIGHUP:
         if (flb_bin_restarting == FLB_RELOAD_IDLE) {
             flb_bin_restarting = FLB_RELOAD_IN_PROGRESS;
         }