ref-manual, mega-manual: Updated buildhistory example figure

Scrubbed the eglibc from the buildhistory directory and
also replaced with an i586 example.

Reported-by: Robert P. J. Day <rpjday@crashcourse.ca>
(From yocto-docs rev: c7469f1a857f278e1adac9012d99802195e36849)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>