Fix mercurial package versioning

Use `hg id -r .` to remove the working dir from the distance, and
compare this distance with 1 instead of 0 because we always get
a tagging commit in addition to the tagged commit.

This now matches the logic inside hg.sr.ht/.builds/alpine.yml

pkgkit

@@ -182,10 +182,10 @@ print_pkgver() {
 		fi
 	elif [ -d .hg ]
 	then
-		pkgver=$(hg id -T '{latesttag}')
-		if [ "$(hg id -T '{latesttagdistance}')" -ne 0 ]
+		pkgver=$(hg id -r . -T '{latesttag}')
+		if [ "$(hg id -r . -T '{latesttagdistance}')" -ne 1 ]
 		then
-			pkgver="$(hg id -T '{latesttag}_hg{sub("-", "", date|shortdate)}')"
+			pkgver="$(hg id -r . -T '{latesttag}_hg{sub("-", "", date|shortdate)}')"
 		fi
 	else
 		pkgver=unknown_0000