checktrust: Rename lightdm related files

Rename files related to lighdm so that they are prefixed with
"lightdm-" and move all files into single source directory.

checktrust/lightdm-greeter-wrapper

@@ -0,0 +1,3 @@
+#! /bin/bash
+(/usr/libexec/lightdm-show-trust-warning &)
+exec "$@"

checktrust/lightdm-use-wrapper.conf

@@ -0,0 +1,2 @@
+[Seat:*]
+greeter-wrapper=/usr/libexec/lightdm-greeter-wrapper

install.sh

@@ -167,9 +167,9 @@ install_data crashkernel/crashkernel.service              "$DESTDIR$systemdunitd
 install_exec crashkernel/crash-recovery.sh                "$DESTDIR$root_sbindir/crash-recovery.sh"
 install_data misc_systemd_units/admin-sshd.service        "$DESTDIR$systemdunitdir/admin-sshd.service"
 mkdir -p "$DESTDIR$sysconfdir/xdg/lightdm/lightdm.conf.d"
-install_data lightdm/50-use-wrapper.conf                  "$DESTDIR$sysconfdir/xdg/lightdm/lightdm.conf.d/50-use-wrapper.conf"
-install_exec lightdm/greeter-wrapper                      "$DESTDIR$usr_exec_prefix/libexec/greeter-wrapper"
-install_exec lightdm/show-trust-warning                   "$DESTDIR$usr_exec_prefix/libexec/show-trust-warning"
+install_data checktrust/lightdm-use-wrapper.conf          "$DESTDIR$sysconfdir/xdg/lightdm/lightdm.conf.d/50-use-wrapper.conf"
+install_exec checktrust/lightdm-greeter-wrapper           "$DESTDIR$usr_exec_prefix/libexec/lightdm-greeter-wrapper"
+install_exec checktrust/lightdm-show-trust-warning        "$DESTDIR$usr_exec_prefix/libexec/lightdm-show-trust-warning"
 mkdir -p "$DESTDIR$sysconfdir/issue.d/"
 install_symlink /node/issue.d/notrust.issue               "$DESTDIR$sysconfdir/issue.d/notrust.issue"
 install_data checktrust/getty-checktrust.service          "$DESTDIR$systemdunitdir/getty-checktrust.service"