Add BUILT_SOURCES to CLEANFILES, so 'make distcheck' is happy.
Add BUILT_SOURCES to CLEANFILES, so 'make distcheck' is happy.

projedi/libzip,projedi/libzip,projedi/libzip,JanX2/libzip-git,cysp/libzip,projedi/libzip,cysp/libzip,JanX2/libzip-git,cysp/libzip,cysp/libzip