Merge bitcoin/bitcoin#22174: build, qt: Fix libraries linking order for Linux hosts

a8bd5ea build, qt: Fix libraries linking order for Linux hosts (Hennadii Stepanov)

Pull request description:

  `-lxcb-shm` should follow `-lxcb` when linking libraries for Linux hosts.

  Fixes #22105.

ACKs for top commit:
  prayank23:
    ACK bitcoin/bitcoin@a8bd5ea
  fanquake:
    ACK a8bd5ea

Tree-SHA512: 6ea2a1ba5440dd01e64428e5c3aa3e7a6e1380b723071ad38a0516b23b56dc252cb2a6544e014b13a0b2f89b3fe45c04a82e498669b5cc74a5f9b70d9c270926

Author: fanquake

build-aux/m4/bitcoin_qt.m4

@@ -150,7 +150,7 @@ AC_DEFUN([BITCOIN_QT_CONFIGURE],[
       AC_DEFINE(QT_QPA_PLATFORM_WINDOWS, 1, [Define this symbol if the qt platform is windows])
     elif test "x$TARGET_OS" = xlinux; then
       dnl workaround for https://bugreports.qt.io/browse/QTBUG-74874
-      AX_CHECK_LINK_FLAG([-lxcb-shm], [QT_LIBS="-lxcb-shm $QT_LIBS"], [AC_MSG_ERROR([could not link against -lxcb-shm])])
+      AX_CHECK_LINK_FLAG([-lxcb-shm], [QT_LIBS="$QT_LIBS -lxcb-shm"], [AC_MSG_ERROR([could not link against -lxcb-shm])])
       _BITCOIN_QT_CHECK_STATIC_PLUGIN([QXcbIntegrationPlugin], [-lqxcb])
       AC_DEFINE(QT_QPA_PLATFORM_XCB, 1, [Define this symbol if the qt platform is xcb])
     elif test "x$TARGET_OS" = xdarwin; then