CMake: Add 'USES_TERMINAL' to custom target for Ninja

With the Ninja generator, output from custom target is captured
and buffered, progress is only visible after the command finishes

Adding USES_TERMINAL enables real-time progress output during the custom step

Author: ruslo

test/CMakeLists.txt

@@ -38,7 +38,7 @@ if(EXCLUDE_TESTS)
   set(PCL_CTEST_ARGUMENTS ${PCL_CTEST_ARGUMENTS} -E "(${EXCLUDE_TESTS_REGEX})")
 endif()
 
-add_custom_target(tests "${CMAKE_CTEST_COMMAND}" ${PCL_CTEST_ARGUMENTS} -V -T Test VERBATIM)
+add_custom_target(tests "${CMAKE_CTEST_COMMAND}" ${PCL_CTEST_ARGUMENTS} -V -T Test VERBATIM USES_TERMINAL)
 
 set_target_properties(tests PROPERTIES FOLDER "Tests")