Makefile: check target for sparse checking
Makefile: check target for sparse checking

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