qapi: Add missing JSON files in build dependencies

Forgotten in commit 1dde0f48 (trace.json) and commit fafa4d50
(rocker.json).
Signed-off-by: NLluís Vilanova <vilanova@ac.upc.edu>
Message-Id: <145461055662.15201.2702170180078718114.stgit@localhost>
Reviewed-by: NEric Blake <eblake@redhat.com>
[Commit message tweaked]
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>

Makefile

@@ -272,7 +272,8 @@ $(SRC_PATH)/qga/qapi-schema.json $(SRC_PATH)/scripts/qapi-commands.py $(qapi-py)
 qapi-modules = $(SRC_PATH)/qapi-schema.json $(SRC_PATH)/qapi/common.json \
                $(SRC_PATH)/qapi/block.json $(SRC_PATH)/qapi/block-core.json \
                $(SRC_PATH)/qapi/event.json $(SRC_PATH)/qapi/introspect.json \
-               $(SRC_PATH)/qapi/crypto.json
+               $(SRC_PATH)/qapi/crypto.json $(SRC_PATH)/qapi/rocker.json \
+               $(SRC_PATH)/qapi/trace.json
 
 qapi-types.c qapi-types.h :\
 $(qapi-modules) $(SRC_PATH)/scripts/qapi-types.py $(qapi-py)