Include qapi/qmp/qdict.h exactly where needed

This cleanup makes the number of objects depending on qapi/qmp/qdict.h
drop from 4550 (out of 4743) to 368 in my "build everything" tree.
For qapi/qmp/qobject.h, the number drops from 4552 to 390.

While there, separate #include from file comment with a blank line.

Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20180201111846.21846-13-armbru@redhat.com>

net/net.c

@@ -34,6 +34,7 @@
 #include "monitor/monitor.h"
 #include "qemu-common.h"
 #include "qemu/help_option.h"
+#include "qapi/qmp/qdict.h"
 #include "qapi/qmp/qerror.h"
 #include "qemu/error-report.h"
 #include "qemu/sockets.h"

net/slirp.c

@@ -21,6 +21,7 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
+
 #include "qemu/osdep.h"
 #include "net/slirp.h"
 
@@ -41,6 +42,7 @@
 #include "sysemu/sysemu.h"
 #include "qemu/cutils.h"
 #include "qapi/error.h"
+#include "qapi/qmp/qdict.h"
 
 static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
 {

net/tap_int.h

@@ -27,6 +27,7 @@
 #define NET_TAP_INT_H
 
 #include "qemu-common.h"
+#include "qapi-types.h"
 
 int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
              int vnet_hdr_required, int mq_required, Error **errp);