fcgiwrap: add .hash file
Fixes:
http://autobuild.buildroot.org/results/b62/b6200a14da6445eb68915d52211035e326ec82f0/
Similar to jquery-keyboard, it seems the fcgiwrap tarball on the autobuilder
is corrupt. Fix it by adding a .hash file so it falls back to our s.b.o
mirror.
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>