CMakeLists.txt - merge mistake, apparently

include/CMakeLists.txt - install from CMAKE_CURRENT_BINARY_DIR.
  Only install from CMAKE_CURRENT_SOURCE_DIR, if it's different
  from CMAKE_CURRENT_BINARY_DIR

mysql-test/CMakeLists.txt - INSTALL_MYSQL_TEST() macro installs
  everything, no need to install mtr separately once again

mysql-test/lib/My/SafeProcess/CMakeLists.txt
  MYSQL_ADD_EXECUTABLE includes INSTALL

sql-bench/CMakeLists.txt
  list files explicitly. don't install garbage, don't process 'foo'
  and 'foo.sh' separately, it's only one file to install, not two.