Add Hera to buildpacks.

scripts/docker/buildpack-deps/Dockerfile.ubuntu1604.clang.ossfuzz

@@ -22,7 +22,7 @@
 # (c) 2016-2019 solidity contributors.
 #------------------------------------------------------------------------------
 FROM gcr.io/oss-fuzz-base/base-clang as base
-LABEL version="1"
+LABEL version="2"
 
 ARG DEBIAN_FRONTEND=noninteractive
 
@@ -96,6 +96,18 @@ RUN set -ex; \
 	ninja install/strip; \
 	rm -rf /usr/src/evmone
 
+# HERA
+RUN set -ex; \
+	cd /usr/src; \
+	git clone --branch="v0.3.0" --recurse-submodules https://github.com/ewasm/hera.git; \
+	cd hera; \
+	mkdir build; \
+	cd build; \
+	cmake -G Ninja -DBUILD_SHARED_LIBS=OFF -DCMAKE_INSTALL_PREFIX="/usr" ..; \
+	ninja; \
+	ninja install/strip; \
+	rm -rf /usr/src/hera
+
 FROM base
 COPY --from=libraries /usr/lib /usr/lib
 COPY --from=libraries /usr/bin /usr/bin