message: hammer: fixed escaping for MinGW
diff: @@ -116,7 +116,7 @@ foreach(file ${files})
  set_tests_properties("${testcase}_default" PROPERTIES LABELS "default")
  add_test(NAME "${testcase}_all"
  - COMMAND ${testcase} ${CATCH_TEST_FILTER} "*"
  + COMMAND ${testcase} ${CATCH_TEST_FILTER} "\\*"
  WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}
  )
  set_tests_properties("${testcase}_all" PROPERTIES LABELS "all")
  