build: fix build breakage due to bad merge

34bb443ee74df3780d86044dbf6492eb798c5807 broke the build but in a subtle way.
The patch on the ML was actually based on the 1.1.1 stable branch
(accidentally).  When I merged it from the ML, the fuzzing got resolved in a
such a way that the newly introduced Makefile dependency on GENERATED_HEADERS
got lost (that was not in 1.1.1).

The dist bits also got duplicated (but this is just cosmetic).

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
