qemu-common: stop including qemu/bswap.h from qemu-common.h

Move it to the actual users.  There are still a few includes of
qemu/bswap.h in headers; removing them is left for future work.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/ui/vnc-ws.c b/ui/vnc-ws.c
index 7c79a4c..3bac46e 100644
--- a/ui/vnc-ws.c
+++ b/ui/vnc-ws.c
@@ -22,6 +22,7 @@
 #include "qapi/error.h"
 #include "vnc.h"
 #include "io/channel-websock.h"
+#include "qemu/bswap.h"
 
 static void vncws_tls_handshake_done(Object *source,
                                      Error *err,