Fix: nanopb files always generated

The dependencies of nanopb generation targets are incorrect and as
a result the project is re-built even if there are no changed
files. This patch corrects the dependencies and eliminates the
unnecessary rebuilds.

Change-Id: I52b07fcb868594994e2b61f4beb419a9928b8db2
Signed-off-by: Gyorgy Szing <Gyorgy.Szing@arm.com>
1 file changed