sd-bus: rename bloom-tag to arg0-has

We use dashes in our bloom-tags. Make sure the newly introduced arg0has
tag uses the same style.

Note that the external dbus-tags don't use dashes, though. They are
defined in the spec and we need to keep compatibility there.

src/libsystemd/sd-bus/bus-control.c

@@ -1309,9 +1309,9 @@ int bus_add_match_internal_kernel(
                 }
 
                 case BUS_MATCH_ARG_HAS...BUS_MATCH_ARG_HAS_LAST: {
-                        char buf[sizeof("arg")-1 + 2 + sizeof("has")];
+                        char buf[sizeof("arg")-1 + 2 + sizeof("-has")];
 
-                        xsprintf(buf, "arg%ihas", c->type - BUS_MATCH_ARG_HAS);
+                        xsprintf(buf, "arg%i-has", c->type - BUS_MATCH_ARG_HAS);
                         bloom_add_pair(bloom, bus->bloom_size, bus->bloom_n_hash, buf, c->value_str);
                         using_bloom = true;
                         break;

src/libsystemd/sd-bus/bus-kernel.c

@@ -168,7 +168,7 @@ static void add_bloom_arg(void *data, size_t size, unsigned n_hash, unsigned i,
 }
 
 static void add_bloom_arg_has(void *data, size_t size, unsigned n_hash, unsigned i, const char *t) {
-        char buf[sizeof("arg")-1 + 2 + sizeof("has")];
+        char buf[sizeof("arg")-1 + 2 + sizeof("-has")];
         char *e;
 
         assert(data);
@@ -184,7 +184,7 @@ static void add_bloom_arg_has(void *data, size_t size, unsigned n_hash, unsigned
                 *(e++) = '0' + (char) (i % 10);
         }
 
-        strcpy(e, "has");
+        strcpy(e, "-has");
         bloom_add_pair(data, size, n_hash, buf, t);
 }