libxdmcp: upgrade 1.1.4 -> 1.1.5

libxdmcp: upgrade 1.1.4 -> 1.1.5

Changelog:
==========
-gitlab CI: add xz-utils to container for "make distcheck"
-XdmcpWriteHeader: use calloc instead of malloc to alloc buffer
-XdmcpWriteHeader: drop unnecessary cast of free() argument
-Clear -Wunused-macros warnings when arc4random_buf() is available
-Xdmcp.h: add access attributes to function prototypes
-configure: Use LT_INIT from libtool 2 instead of deprecated AC_PROG_LIBTOOL
-Remove "All rights reserved" from Oracle copyright notices

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>