Upgrade LLVM to version 11

A problem similar to that of LLVM 7 on s390x exists on ppc64le.
It's fixed in LLVM 11.

Signed-off-by: Ilya Leoshkevich <[email protected]>

Author: iii-i

docker/image/Dockerfile

@@ -34,7 +34,7 @@ ENV DEBIAN_FRONTEND=noninteractive
 RUN apt-get update && \
     apt-get install -y ca-certificates curl
 COPY fs/ /
-ARG llvm_version=8
+ARG llvm_version=11
 RUN apt-get update && \
     apt-get install --no-install-recommends --yes \
         binutils-multiarch \

docker/image/fs/etc/apt/keyrings/llvm-snapshot.gpg

@@ -7,3 +7,4 @@ deb [arch=ppc64el,s390x] http://ports.ubuntu.com/ubuntu-ports/ bionic-security m
 deb [arch=ppc64el,s390x] http://ports.ubuntu.com/ubuntu-ports/ bionic-updates main universe
 deb [arch=ppc64el,s390x] http://ports.ubuntu.com/ubuntu-ports/ bionic-backports main universe
 deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_16.x nodistro main
+deb [signed-by=/etc/apt/keyrings/llvm-snapshot.gpg] http://apt.llvm.org/bionic/ llvm-toolchain-bionic-11 main