bdiff.c: Added support for py3k.
This patch adds support for py3k in bdiff.c. This is accomplished by including
a header file responsible for abstracting the API differences between python 2
and python 3.
#!/bin/sh
"$TESTDIR/hghave" execbit || exit 80
hg init
echo a > a
hg ci -Am'not executable'
chmod +x a
hg ci -m'executable'
hg id
echo '% make sure we notice the change of mode if the cached size == -1'
hg rm a
hg revert -r 0 a
hg debugstate
hg st
hg up 0
hg id
test -x a && echo executable -- eek || echo not executable -- whew