ci: Fix appveyor builds

When building in appveyor, the PATH to go binaries is wrong, it's set to
C:\go116 to try to use go 1.16, but it should be C:\go116\bin. This
resulted in the latest go version being used instead of the intended
one.
Moreover, when using a non-default go version, we also need to set
GOROOT, or weird build errors are going to occur.

Author: cfergeau

appveyor.yml

@@ -7,7 +7,8 @@ before_test:
   - choco install make
   - choco install wixtoolset
   - set PATH=C:\mingw-w64\x86_64-8.1.0-posix-seh-rt_v6-rev0\mingw64\bin;%PATH%
-  - set PATH=C:\go116;%WIX%bin;%PATH%
+  - set PATH=C:\go116\bin;%WIX%bin;%PATH%
+  - set GOROOT=C:\go116
   - make out/windows-amd64/crc-windows-installer.zip
   - make cross
 test_script:

update-go-version.sh

@@ -18,3 +18,4 @@ sed -i "s/GOVERSION: .*\$/GOVERSION: \"${latest_version}\"/" .circleci/config.ym
 sed -i "s/^GO_VERSION=.*$/GO_VERSION=${latest_version}/" centos_ci.sh
 appveyor_go_version=$(echo $golang_base_version | tr -d .)
 sed -i 's/set PATH=C:\\go[0-9]\+/set PATH=C:\\go'${appveyor_go_version}'/' ./appveyor.yml
+sed -i 's/set GOROOT=C:\\go[0-9]\+/set GOROOT=C:\\go'${appveyor_go_version}'"/' ./appveyor.yml