Support Debian's Multi-Arch indicator

For now just in repo metadata.

Author: mlschroe

ext/repo_deb.c

@@ -462,6 +462,10 @@ control2solvable(Solvable *s, Repodata *data, char *control)
 	      checksumtype = REPOKEY_TYPE_MD5;
 	    }
 	  break;
+	case 'M' << 8 | 'U':
+	  if (!strcasecmp(tag, "multi-arch"))
+	    repodata_set_poolstr(data, s - pool->solvables, SOLVABLE_MULTIARCH, q);
+	  break;
 	case 'P' << 8 | 'A':
 	  if (!strcasecmp(tag, "package"))
 	    s->name = pool_str2id(pool, q, 1);

src/knownid.h

@@ -270,7 +270,8 @@ KNOWNID(SOLVABLE_TRACK_FEATURES,	"solvable:track_features"),	/* conda */
 KNOWNID(SOLVABLE_ISDEFAULT,		"solvable:isdefault"),
 KNOWNID(SOLVABLE_LANGONLY,		"solvable:langonly"),
 
-KNOWNID(UPDATE_COLLECTIONLIST,      "update:collectionlist"),  /* list of UPDATE_COLLECTION (actually packages) and UPDATE_MODULE */
+KNOWNID(UPDATE_COLLECTIONLIST,		"update:collectionlist"),	/* list of UPDATE_COLLECTION (actually packages) and UPDATE_MODULE */
+KNOWNID(SOLVABLE_MULTIARCH,		"solvable:multiarch"),		/* debian multi-arch field */
 
 KNOWNID(ID_NUM_INTERNAL,		0)