Fix installation of Go from gimme

GHA does not have gimme pre-installed

Tools/CI-linux-environment.sh

@@ -6,6 +6,12 @@
 set -e # exit on failure (same as -o errexit)
 
 case "$SWIGLANG" in
+	"go")
+		if [[ "$VER" ]]; then
+		  eval "$($HOME/bin/gimme ${VER}.x)"
+		  $HOME/bin/gimme --list
+		fi
+		;;
 	"javascript")
 		case "$ENGINE" in
 			"node")

Tools/CI-linux-install.sh

@@ -26,7 +26,11 @@ case "$SWIGLANG" in
 		;;
 	"go")
 		if [[ "$VER" ]]; then
-		  eval "$(gimme ${VER}.x)"
+		  mkdir -p $HOME/bin
+		  curl -sL -o $HOME/bin/gimme https://raw.githubusercontent.com/travis-ci/gimme/master/gimme
+		  chmod +x $HOME/bin/gimme
+		  eval "$($HOME/bin/gimme ${VER}.x)"
+		  $HOME/bin/gimme --list
 		fi
 		;;
 	"javascript")