lighttpd 1.4.29: rename index.html to avoid clashes with DL_DIR

lighttpd 1.4.29: rename index.html to avoid clashes with DL_DIR

As Martin Jansa pointed out before, bitbake will silently peek in DL_DIR before FILESPATH and use files from there if found.

The failure mode for lighttpd involves a 404 redirect placing index.html into DL_DIR, which will end up in the lighttpd packages. In my specific case iproute2 hit the linuxfoundation 404 redirect so lighttpd.ipk now serves the linuxfoundation frontpage :)

(From OE-Core rev: 0809f98e995d3a2ce24ad25bade3dcd5154061fd)

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>