Add htslib project files (#2843)

* Add htslib project files

Only build the library and hts_open_fuzzer.o.  The binaries are
not needed and fail to build anyway due to missing libfuzzer
symbols.

* Use $LIB_FUZZING_ENGINE

projects/htslib/Dockerfile

@@ -0,0 +1,22 @@
+# Copyright 2018 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 rmd@sanger.ac.uk
+RUN apt-get update && apt-get install -y make autoconf automake zlib1g-dev libbz2-dev liblzma-dev libcurl4-gnutls-dev libssl-dev
+RUN git clone --depth 1 https://github.com/samtools/htslib.git htslib
+WORKDIR htslib
+COPY build.sh $SRC/

projects/htslib/build.sh

@@ -0,0 +1,25 @@
+#!/bin/bash -eu
+# Copyright 2018 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.
+#
+################################################################################
+
+# build project
+autoconf
+autoheader
+./configure
+make -j$(nproc) libhts.a test/fuzz/hts_open_fuzzer.o
+
+# build fuzzers
+$CXX $CXXFLAGS -o "$OUT/hts_open_fuzzer" test/fuzz/hts_open_fuzzer.o $LIB_FUZZING_ENGINE libhts.a -lz -lbz2 -llzma -lcurl -lcrypto -lpthread

projects/htslib/project.yaml

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+homepage: "https://www.htslib.org/"
+primary_contact: "rmd@sanger.ac.uk"
+auto_ccs:
+        - "aw7@sanger.ac.uk"
+        - "jkb@sanger.ac.uk"
+        - "vo2@sanger.ac.uk"