Fix bin/check_gx_program on Windows where gx -v outputs full path

License: MIT
Signed-off-by: Jakub Sztandera <kubuxu@gmail.com>

bin/check_gx_program

@@ -85,6 +85,6 @@ type "$GX_PROGRAM_NAME" >/dev/null 2>&1 || die_upgrade "Program $GX_PROGRAM_NAME
 
 VERS_STR=$($GX_PROGRAM_NAME -v 2>&1) || die "'$GX_PROGRAM_NAME -v' failed with output: $VERS_STR"
 
-GX_CUR_VERSION=$(expr "$VERS_STR" : "$GX_PROGRAM_NAME version \(.*\)") || die "Invalid '$GX_PROGRAM_NAME -v' output: $VERS_STR"
+GX_CUR_VERSION=$(expr "$VERS_STR" : ".*$GX_PROGRAM_NAME.* version \(.*\)") || die "Invalid '$GX_PROGRAM_NAME -v' output: $VERS_STR"
 
 check_at_least_version "$GX_MIN_VERSION" "$GX_CUR_VERSION" "$GX_PROGRAM_NAME"