jemalloc broken on win32

[klutzy]

I experienced build failure during #8662, and I've heard same problem today at irc.
Here's the failure log.
Seems like configure failed to find definitions for win32. (#error "No size class definitions match configuration")

[klutzy]

For record: it is due to CRLF (wow!), and #8738 fixes it by force git checkout LF for certain files.
However, the fix does not help if you already checkout out repo before #8738 landed. For those cases, remove jemalloc directory (git rm --force -r src/etc/jemalloc) and checkout again (git checkout src/etc/jemalloc).