Add bionic llvm-7 docker

Author: Yevgeny Pats

docker/ubuntu/bionic/llvm7/Dockerfile

@@ -0,0 +1,12 @@
+FROM ubuntu:bionic
+
+LABEL maintainer="Fuzzit.dev, inc."
+
+RUN apt-get -qqy update && apt-get install -y wget gnupg2 unzip
+
+RUN echo "deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic-7 main" >> /etc/apt/sources.list
+RUN echo "deb-src http://apt.llvm.org/bionic/ llvm-toolchain-bionic-7 main" >> /etc/apt/sources.list
+RUN wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key| apt-key add -
+RUN apt update && apt-get install -y libllvm-7-ocaml-dev libllvm7 llvm-7 llvm-7-dev llvm-7-doc llvm-7-examples llvm-7-runtime
+RUN apt update && apt-get install -y clang-7 clang-tools-7 clang-7-doc libclang-common-7-dev libclang-7-dev libclang1-7 clang-format-7 python-clang-7
+RUN ln -s /usr/lib/llvm-7/bin/llvm-symbolizer /bin/llvm-symbolizer