Mark more sdk targets as PHONY

These are used in various dist-for-goal targets even if we're not
currently building the sdks, so they always need to be marked with
.PHONY.

Test: m dist
Change-Id: I1e11ae37c6d0fd6ef8a3e293cf7409773c1bf3ab
diff --git a/core/tasks/sdk-addon.mk b/core/tasks/sdk-addon.mk
index 2a20f07..29abf48 100644
--- a/core/tasks/sdk-addon.mk
+++ b/core/tasks/sdk-addon.mk
@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+.PHONY: sdk_addon
 
 # If they didn't define PRODUCT_SDK_ADDON_NAME, then we won't define
 # any of these rules.
@@ -121,7 +122,6 @@
 	$(hide) $(SOONG_ZIP) -o $@ -C $(dir $(PRIVATE_STAGING_DIR)) -D $(PRIVATE_STAGING_DIR)
 
 
-.PHONY: sdk_addon
 sdk_addon: $(full_target) $(full_target_img)
 
 ifneq ($(sdk_repo_goal),)