antimake: JoinPath: Handle '..' under root directory
antimake: JoinPath: Handle '..' under root directory

markokr/libusual,rabbitt/libusual,ifduyue/libusual,markokr/libusual,mgjv/libusual,ifduyue/libusual,rabbitt/libusual,ifduyue/libusual,markokr/libusual,mgjv/libusual,mgjv/libusual,markokr/libusual,rabbitt/libusual,rabbitt/libusual,mgjv/libusual,ifduyue/libusual