libmysqlclient versioning when linked with GNU ld.


BitKeeper/etc/ignore:
  Added libmysql/libmysql.ver to the ignore list
configure.in:
  libmysqlclient versioning when linked with GNU ld.
libmysql/Makefile.shared:
  libmysqlclient versioning when linked with GNU ld.
libmysql/libmysql.ver.in:
  New BitKeeper file ``libmysql/libmysql.ver.in''