unix: update Dockerfile to Go 1.14.2

Go 1.14.2 fixes golang/go#37621 which allows the Go types to be
generated properly again.

Change-Id: I556c7dd37713d68ef6aad79adc33b2d227e8bbd3
Reviewed-on: https://go-review.googlesource.com/c/sys/+/227678
Run-TryBot: Tobias Klauser <[email protected]>
Reviewed-by: Matt Layher <[email protected]>
Reviewed-by: Ian Lance Taylor <[email protected]>
TryBot-Result: Gobot Gobot <[email protected]>

Author: tklauser

unix/linux/Dockerfile

@@ -18,10 +18,9 @@ RUN git clone --branch v5.6 --depth 1 https://kernel.googlesource.com/pub/scm/li
 RUN git clone --branch release/2.31/master --depth 1 git://sourceware.org/git/glibc.git
 
 # Get Go
-# TODO: update to Go 1.14 once there is a minor release with https://golang.org/issue/37622 fixed.
-ENV GOLANG_VERSION 1.13.9
+ENV GOLANG_VERSION 1.14.2
 ENV GOLANG_DOWNLOAD_URL https://golang.org/dl/go$GOLANG_VERSION.linux-amd64.tar.gz
-ENV GOLANG_DOWNLOAD_SHA256 f4ad8180dd0aaf7d7cda7e2b0a2bf27e84131320896d376549a7d849ecf237d7
+ENV GOLANG_DOWNLOAD_SHA256 6272d6e940ecb71ea5636ddb5fab3933e087c1356173c61f4a803895e947ebb3
 
 RUN curl -fsSL "$GOLANG_DOWNLOAD_URL" -o golang.tar.gz \
     && echo "$GOLANG_DOWNLOAD_SHA256  golang.tar.gz" | sha256sum -c - \