Add libjpeg-dev to list of required linux packages.
This to enable compiling Pillow from source on Python 3.9.
Issue
@@ -76,7 +76,7 @@ On macOS you can use the system compiler and install
On linux, install the required toolchain using:
- $ sudo apt install clang libtinfo5 patchelf
+ $ sudo apt install clang libtinfo5 libjpeg-dev patchelf
$ wget https://github.com/bazelbuild/bazelisk/releases/download/v1.7.5/bazelisk-linux-amd64 -O bazel && chmod +x bazel
$ sudo mv bazel /usr/local/bin
$ export CC=clang
