build: disable -Wnon-virtual-dtor compiler warning

See also named-data/NFD@0a05f7aea6

Change-Id: If93d766fa8ee2b0cb6a0eb8ff9febc2dc0a4cac0

.waf-tools/default-compiler-flags.py

@@ -158,7 +158,6 @@ class GccClangCommonFlags(CompilerFlags):
         '-Wpedantic',
         '-Wenum-conversion',
         '-Wextra-semi',
-        '-Wnon-virtual-dtor',
         '-Wno-unused-parameter',
     ]
     __linkFlags = ['-Wl,-O1']

tests/chunks/consumer.t.cpp

@@ -125,7 +125,7 @@ BOOST_AUTO_TEST_CASE(OutOfOrderData)
   BOOST_CHECK(output.is_equal(testStrings[2]));
 }
 
-class PipelineInterestsDummy : public PipelineInterests
+class PipelineInterestsDummy final : public PipelineInterests
 {
 public:
   using PipelineInterests::PipelineInterests;