Fix 2.6.18 ext3 mballoc, extents patches for several omissions.
Reorder patch hunks to match other patches to facilitate comparisons.
b=10090  ldiskfs corruption under memory pressure, coverity fixes
b=6191   mballoc fails on x86_64 > 2TB
b=10634  mballoc using wrong find_next_bit() on big endian systems
b=6449   don't print "too long searching" message to console

Compile tested.