KWSys: Optionally suppress consistent test failures

Add option KWSYS_TEST_BOGUS_FAILURES that can be set by a containing
project or in the CMake cache to list tests known to fail consistently
on a buggy system.

Source/kwsys/CMakeLists.txt

@@ -1125,5 +1125,11 @@ IF(KWSYS_STANDALONE OR CMake_SOURCE_DIR)
       SET_TESTS_PROPERTIES(kwsys.testFail PROPERTIES MEASUREMENT "Some Key=Some Value")
       MESSAGE(STATUS "GET_TEST_PROPERTY returned: ${wfv}")
     ENDIF(COMMAND SET_TESTS_PROPERTIES AND COMMAND GET_TEST_PROPERTY AND KWSYS_STANDALONE)
+
+    # Suppress known consistent failures on buggy systems.
+    IF(KWSYS_TEST_BOGUS_FAILURES)
+      SET_TESTS_PROPERTIES(${KWSYS_TEST_BOGUS_FAILURES} PROPERTIES WILL_FAIL ON)
+    ENDIF()
+
   ENDIF(BUILD_TESTING)
 ENDIF(KWSYS_STANDALONE OR CMake_SOURCE_DIR)