package/libxmlrpc: bump version to 1.54.03 (code/stable@r3120)

package/libxmlrpc: bump version to 1.54.03 (code/stable@r3120)

- change to SVN download (according to [1] only 1.51.x available
  via Sourceforge download)

- remove 0001-use-correct-curl-config.patch
  (upstream applied)

Changelog ([2], [3]):

  - Build: Use 'curl-config' found at configure time, not at make time.

  - Build: fix bug: ignores LDFLAGS_FOR_BUILD, LDFLAGS_PERSONAL, and
    LDFLAGS_PTHREAD when building the build tool Gennmtab.

  - Build: fix bug: won't compile with --enable-libxml2, introduced with
    Release 1.44 (December 2015).

  - Abyss: fix bug: wild memory reference when server times out waiting for
    request header. Introduced with Release 1.44 (December 2015).

[1] http://xmlrpc-c.sourceforge.net/downloading.php
[2] http://xmlrpc-c.sourceforge.net/change.html
[3] http://xmlrpc-c.sourceforge.net/change_stable.html

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>