loader: add NpdmUtils function for invalidating the cache for a specific title

stratosphere/loader/source/ldr_npdm.cpp

@@ -500,4 +500,10 @@ u32 NpdmUtils::GetApplicationTypeRaw(u32 *caps, size_t num_caps) {
         }
     }
     return application_type;
-}
+}
+
+void NpdmUtils::InvalidateCache(u64 tid) {
+    if (g_npdm_cache.info.title_id == tid) {
+        g_npdm_cache.info = (const NpdmUtils::NpdmInfo){0};
+    }
+}

stratosphere/loader/source/ldr_npdm.hpp

@@ -108,6 +108,8 @@ class NpdmUtils {
         static FILE *OpenNpdm(u64 tid);
         static Result LoadNpdm(u64 tid, NpdmInfo *out);
         static Result LoadNpdmFromCache(u64 tid, NpdmInfo *out);
+
+        static void InvalidateCache(u64 tid);
     private:
         static Result LoadNpdmInternal(FILE *f_npdm, NpdmCache *cache);
-};
+};