[immer] Add Immer project (#4129)

* Delete files that clearly someone added by mistake

* [immer] Add initial integration

projects/immer/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
+RUN apt-get update && apt-get install -y cmake libgc-dev
+RUN git clone --depth 1 https://github.com/arximboldi/immer.git immer
+WORKDIR immer
+COPY build.sh $SRC/

projects/immer/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.
+#
+################################################################################
+
+
+mkdir build
+cd build
+cmake .. \
+      -DBOEHM_GC_INCLUDE_DIR=/usr/include \
+      -DBOEHM_GC_LIBRARIES=/usr/lib/x86_64-linux-gnu/libgc.a
+make -j$(nproc) fuzzers
+
+for fuzzer in extra/fuzzer/*; do
+    if [[ -f $fuzzer && -x $fuzzer ]]; then
+        cp $fuzzer $OUT
+    fi
+done

projects/immer/project.yaml

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+homepage: "https://sinusoid.es/immer"
+language: c++
+primary_contact: "juanpe@sinusoid.al"