askama: initial integration (#10935)

Hi, [Askama](https://github.com/djc/askama) is one of the popular
template rendering engine based on
[Jinja](https://jinja.palletsprojects.com/).
- It has `3 million+` downloads as per
[crates.io](https://crates.io/crates/askama).
 - It being used by projects like:
   - [mozilla/uniffi-rs](https://github.com/mozilla/uniffi-rs)
     - a multi-language bindings generator for rust. 
- It also used along with web frameworks like
[actix](https://crates.io/crates/actix),
[axum](https://crates.io/crates/axum),
[warp](https://crates.io/crates/warp).

projects/askama/Dockerfile

@@ -0,0 +1,21 @@
+# Copyright 2023 Google LLC
+#
+# 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-rust
+RUN apt-get update && apt-get install -y make autoconf automake libtool
+RUN git clone --depth 1 https://github.com/djc/askama askama
+WORKDIR askama
+COPY build.sh $SRC/

projects/askama/build.sh

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+#!/bin/bash -eu
+# Copyright 2023 Google LLC
+#
+# 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.
+#
+################################################################################
+
+set -eox pipefail
+
+FUZZ_CRATE_DIRS=$(find . -type d -name fuzz -exec dirname $(readlink -f {}) \;)
+
+for CRATE_DIR in ${FUZZ_CRATE_DIRS[@]};
+do
+  echo "Building crate: $CRATE_DIR"
+  cd $CRATE_DIR
+  cargo +nightly fuzz build -O
+  FUZZ_TARGET_OUTPUT_DIR=fuzz/target/x86_64-unknown-linux-gnu/release
+  for f in fuzz/fuzz_targets/*.rs
+  do
+      FUZZ_TARGET_NAME=$(basename ${f%.*})
+      CRATE_NAME=$(basename $CRATE_DIR)
+      cp $FUZZ_TARGET_OUTPUT_DIR/$FUZZ_TARGET_NAME $OUT/$CRATE_NAME-$FUZZ_TARGET_NAME
+  done
+done

projects/askama/project.yaml

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+homepage: "https://crates.io/crates/askama"
+language: rust
+primary_contact: "djc.ochtman@gmail.com"
+main_repo: "https://github.com/djc/askama"
+vendor_ccs:
+  - maxnair.dev@gmail.com
+sanitizers:
+  - address
+fuzzing_engines:
+  - libfuzzer
+coverage_extra_args: >
+  -ignore-filename-regex=.*/rustc/.*