ovsdb-idlc: Write a new-line at the end of "annotate" output.
Some tools do not like text files that lack a trailing new-line. In
particular, Debian's dpkg-source utility complains about a missing new-line
in the file generated by ovsdb-idlc:
dpkg-source: warning: file
openvswitch-1.9.2+git20130605/lib/vswitch-idl.ovsidl has no final
newline (either original or modified version)
This commit fixes the problem.
Signed-off-by: Ben Pfaff <blp@nicira.com> Acked-by: Ethan Jackson <ethan@nicira.com>