xbps-src: drop fakeroot; xbps-create(8) is our friend.

- This should work for almost 90% current packages, as reported by OpenBSD/ports.
- Packages that use install -o <user> -g <group>  will get fixed progressively.
- xbps-create(8) by default sets pkg files as 0:0, if any pkg needs special
  permissions those can be set via INSTALL scripts (for now).

common/xbps-src/shutils/common.sh

@@ -52,13 +52,6 @@ msg_red_nochroot() {
 
 msg_error() {
     msg_red "$@"
-    kill -INT $$; exit 1
-}
-
-msg_error_nochroot() {
-    [ -n "$NOCOLORS" ] || printf >&2 "\033[1m\033[31m"
-    printf >&2 "=> ERROR: $@"
-    [ -n "$NOCOLORS" ] || printf >&2 "\033[m"
     exit 1
 }