Added the Janet project (#3671)

* Added the janet language - waiting for email from the maintainers.

* Added email address for correct maintaner.

projects/janet/Dockerfile

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+# Copyright 2020 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 david@adalogics.com
+RUN apt-get update && apt-get install -y make cmake
+RUN git clone https://github.com/janet-lang/janet
+
+WORKDIR $SRC
+COPY build.sh $SRC/

projects/janet/build.sh

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+#!/bin/bash -eu
+# Copyright 2020 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.
+#
+################################################################################
+cd janet
+make
+
+clang $CFLAGS -std=c99 -Isrc/include -Isrc/conf -fPIC  -o fuzz_dostring.o -c ./test/fuzzers/fuzz_dostring.c
+clang++ $CXXFLAGS $LIB_FUZZING_ENGINE fuzz_dostring.o build/libjanet.a -o $OUT/fuzz_dostring

projects/janet/project.yaml

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+homepage: "https://github.com/janet-lang/janet"
+primary_contact: "calsrose@gmail.com"
+language: c++
+auto_ccs:
+  - "david@adalogics.com"