dbus: Do not try to switch user

as Termux is a single-user environment.

packages/dbus/build.sh

@@ -3,6 +3,7 @@ TERMUX_PKG_DESCRIPTION="Freedesktop.org message bus system"
 TERMUX_PKG_LICENSE="GPL-2.0"
 TERMUX_PKG_MAINTAINER="@termux"
 TERMUX_PKG_VERSION=1.15.2
+TERMUX_PKG_REVISION=1
 TERMUX_PKG_SRCURL="https://dbus.freedesktop.org/releases/dbus/dbus-$TERMUX_PKG_VERSION.tar.xz"
 TERMUX_PKG_SHA256=7e640803084af59f5e477b7ded11fd888b5380910a895c51ca3aedd63c0626ca
 TERMUX_PKG_DEPENDS="libexpat, libx11"

packages/dbus/bus-activation-helper.c.patch

@@ -0,0 +1,12 @@
+--- a/bus/activation-helper.c
++++ b/bus/activation-helper.c
+@@ -294,7 +294,8 @@
+ static dbus_bool_t
+ switch_user (char *user, DBusError *error)
+ {
+-#ifndef ACTIVATION_LAUNCHER_TEST
++/* Termux is a single-user environment. */
++#if !defined ACTIVATION_LAUNCHER_TEST && !defined __ANDROID__
+   struct passwd *pw;
+ 
+   /* find user */

packages/dbus/dbus-dbus-sysdeps-util-unix.c.patch

@@ -0,0 +1,36 @@
+--- a/dbus/dbus-sysdeps-util-unix.c
++++ b/dbus/dbus-sysdeps-util-unix.c
+@@ -311,11 +311,16 @@
+ dbus_bool_t
+ _dbus_verify_daemon_user (const char *user)
+ {
++/* Termux is a single-user environment. */
++#ifdef __ANDROID__
++  return TRUE;
++#else
+   DBusString u;
+ 
+   _dbus_string_init_const (&u, user);
+ 
+   return _dbus_get_user_id_and_primary_group (&u, NULL, NULL);
++#endif
+ }
+ 
+ 
+@@ -332,6 +337,8 @@
+ _dbus_change_to_daemon_user  (const char    *user,
+                               DBusError     *error)
+ {
++/* Termux is a single-user environment. */
++#ifndef __ANDROID__
+   dbus_uid_t uid;
+   dbus_gid_t gid;
+   DBusString u;
+@@ -375,6 +382,7 @@
+                       _dbus_strerror (errno));
+       return FALSE;
+     }
++#endif
+ 
+   return TRUE;
+ }