archive storage engine headers don't include my_global.h first


During the build of 5.5.3-m3 on older Linux platforms
(kernels 2.4 or early 2.6),
the symptom described in the bug report occurred both
in the "archive" and in the "innobase" storage engine.

This change is the patch proposed in that bug report,
and a similar one in innobase, that latter is aligned
with Vasil Dimov of Innobase, the original author.