doc: inslist.src is an intermediate file, move to "make clean"
doc: inslist.src is an intermediate file, move to "make clean"

inslist.src is an intermediate file, it should be in "make clean"
rather than "make spotless"; otherwise it ends up in the xdoc tarball.

Signed-off-by: H. Peter Anvin <8a453bad9912ffe59bc0f0b8abe03df9be19379e@linux.intel.com>

Distrotech/nasm,Distrotech/nasm,letolabs/nasm,turingstudio/nasm,Distrotech/nasm,techkey/nasm,letolabs/nasm,turingstudio/nasm,turingstudio/nasm,techkey/nasm,Distrotech/nasm,techkey/nasm,projedi/nasm,projedi/nasm,letolabs/nasm,projedi/nasm,projedi/nasm,turingstudio/nasm,techkey/nasm,projedi/nasm,techkey/nasm