Add LunaSVG

Android/android-ndk-r27d/build/core/define-missing-prebuilt.mk

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+#
+# Copyright (C) 2021 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# https://github.com/android/ndk/issues/1559
+#
+# When LOCAL_ALLOW_MISSING_PREBUILT is true we avoid checking for missing
+# prebuilt libraries early and instead let the copy rule fail. This leads to a
+# worse diagnostic but supports the use case where AGP runs `ndk-build -n` to
+# get the build commands during sync time and the "pre" built library is
+# actually built by another module that hasn't been built yet.
+#
+# This phony target is only generated when the library actually is missing (see
+# the callsite in prebuilt-library.mk).
+.PHONY: $(prebuilt)