LCC: Update -Wunused-variable warning number as of LCC 1.26.16

Source/cmFindPackageCommand.cxx

@@ -379,6 +379,8 @@ private:
 #  pragma diag_suppress 3288 // parameter was declared but never referenced
 #  define CM_LCC_DIAG_SUPPRESS_3301
 #  pragma diag_suppress 3301 // parameter was declared but never referenced
+#  define CM_LCC_DIAG_SUPPRESS_3308
+#  pragma diag_suppress 3308 // parameter was declared but never referenced
 #endif
 
 void ResetGenerator()
@@ -423,6 +425,11 @@ bool TryGeneratedPaths(CallbackFn&& filesCollector,
   return false;
 }
 
+#ifdef CM_LCC_DIAG_SUPPRESS_3308
+#  undef CM_LCC_DIAG_SUPPRESS_3308
+#  pragma diag_default 3308
+#endif
+
 #ifdef CM_LCC_DIAG_SUPPRESS_3301
 #  undef CM_LCC_DIAG_SUPPRESS_3301
 #  pragma diag_default 3301