WRG: Filter out remaining warnings on unknown pragmas

Already tested on dashboard, can be merged.

Copyright

The copyright owner is CNES and has signed the ORFEO ToolBox Contributor License Agreement.

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Check before merging:

• All discussions are resolved
• At least 2 votes from core developers, no vote.
• The feature branch is (reasonably) up-to-date with the base branch
• Dashboard is green
• Copyright owner has signed the ORFEO ToolBox Contributor License Agreement

CMake/CTestCustom.cmake.in

@@ -118,6 +118,8 @@ set(CTEST_CUSTOM_WARNING_EXCEPTION
   ".*LaTeX Warning:.*"
   ".*Package tabulary Warning:.*"
   ".*Package rerunfilecheck Warning:.*"
-  # Silent warning: unknown option after ‘#pragma GCC diagnostic’ kind [-Wpragmas] from GCC 4.9
-  ".*warning: unknown option after \\‘\\#pragma GCC diagnostic\\’ kind \\[-Wpragmas\\]"
+  # Silent warning: unknown option after ‘#pragma GCC diagnostic’ kind [-Wpragmas] from GCC 5.2
+  ".*warning: unknown option after.*pragma GCC diagnostic.*kind.*-Wpragmas.*"
+  # Silent warning: unknown warning group '-Wexpansion-to-defined', ignored [-Wunknown-pragmas] on clang 3.8
+  "warning: unknown warning group.*-Wexpansion-to-defined.*ignored.*-Wunknown-pragmas.*"
   )