Add libsrtp fuzzer (#2183)

* Add libsrtp fuzzer

projects/libsrtp/Dockerfile

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+# Copyright 2016 Google Inc.
+#
+# 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.
+#
+################################################################################
+
+FROM gcr.io/oss-fuzz-base/base-builder
+MAINTAINER guidovranken@gmail.com
+RUN apt-get update && apt-get install -y sudo autoconf build-essential libssl-dev pkg-config
+
+RUN git clone --recursive https://github.com/guidovranken/libsrtp
+COPY build.sh $SRC/

projects/libsrtp/build.sh

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+cd $SRC/libsrtp
+git checkout fuzzing
+git fetch origin fuzzing
+autoreconf -ivf
+./configure
+LIBFUZZER="-lFuzzingEngine" make srtp-fuzzer
+zip -r srtp-fuzzer_seed_corpus.zip fuzzer/corpus
+cp $SRC/libsrtp/fuzzer/srtp-fuzzer $OUT
+cp srtp-fuzzer_seed_corpus.zip $OUT

projects/libsrtp/project.yaml

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+homepage: "https://github.com/cisco/libsrtp"
+primary_contact: "richbarn@cisco.com"
+auto_ccs:
+    - "guidovranken@gmail.com"
+fuzzing_engines:
+    - libfuzzer