Fixed bug in automatic repair of MyISAM tables where table cache was not locked properly


Docs/manual.texi:
  Changelog
libmysql/Makefile.am:
  Fixed problem with make distcheck
libmysql/Makefile.shared:
  Fixed problem with make distcheck
sql/sql_base.cc:
  Fixed bug in automatic repair where table cache was not locked properly.
strings/Makefile.am:
  Fixed problem with make distcheck