build: reorganise build: abi4, fallback, prebuild cli

- ABI4 by default, fallback to abi 3.
- aa-prebuild cli that can be used by other project shipping profiles.
- --file option to cli to only build one dev profile.
- add abi version filter to only & exclude directives.

pkg/prebuild/builder/userspace.go

@@ -10,7 +10,7 @@ import (
 	"strings"
 
 	"github.com/roddhjav/apparmor.d/pkg/aa"
-	"github.com/roddhjav/apparmor.d/pkg/prebuild/cfg"
+	"github.com/roddhjav/apparmor.d/pkg/prebuild"
 )
 
 const tokATTACHMENT = "@{exec_path}"
@@ -20,12 +20,12 @@ var (
 )
 
 type Userspace struct {
-	cfg.Base
+	prebuild.Base
 }
 
 func init() {
 	RegisterBuilder(&Userspace{
-		Base: cfg.Base{
+		Base: prebuild.Base{
 			Keyword: "userspace",
 			Msg:     "Bypass userspace tools restriction",
 		},
@@ -33,10 +33,10 @@ func init() {
 }
 
 func (b Userspace) Apply(opt *Option, profile string) (string, error) {
-	if ok, _ := opt.File.IsInsideDir(cfg.RootApparmord.Join("abstractions")); ok {
+	if ok, _ := opt.File.IsInsideDir(prebuild.RootApparmord.Join("abstractions")); ok {
 		return profile, nil
 	}
-	if ok, _ := opt.File.IsInsideDir(cfg.RootApparmord.Join("tunables")); ok {
+	if ok, _ := opt.File.IsInsideDir(prebuild.RootApparmord.Join("tunables")); ok {
 		return profile, nil
 	}