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/prepare/core.go

@@ -7,7 +7,7 @@ package prepare
 import (
 	"fmt"
 
-	"github.com/roddhjav/apparmor.d/pkg/prebuild/cfg"
+	"github.com/roddhjav/apparmor.d/pkg/prebuild"
 )
 
 var (
@@ -20,7 +20,7 @@ var (
 
 // Main directive interface
 type Task interface {
-	cfg.BaseInterface
+	prebuild.BaseInterface
 	Apply() ([]string, error)
 }