binary portions (Hurd). This patch splits up the build targets so this is
possible:

"main" becomes "arch"

"indep" is created and depends on "docs"
po building is moved from "main" to "indep"

"all" has "tests" removed (standard build practices are to "make" then
"make check" so I think "tests"/"check" should stay separate from "all").

redundant chunk is removed (this exists twice in the Makefile):
-.SILENT: check
-check: tests

"install" is split into "install-indep" and "install-arch"

"install-arch" requires "arch" and only installs the binaries

"install-indep" requires "indep" and only install non-binaries

Additionally, update the README to mention the "check" target both for the
parser and the utils.

Signed-off-by: Kees Cook <kees.cook@canonical.com>
Acked-by: Steve Beattie <steve@nxnw.org>