When you "make" the mega-manual, there were four tags across the
various manuals where the same string "id='intro'" occurred. This
causes warnings during the make process. I updated the strings to
be unique. There are no cross-references to these so no collateral
issues were caused.
(From yocto-docs rev: d0e770e0ad797031a75e2373a41723408b4b051c)
Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>