[PATCH] config.sub: fix i*86-pc-os2-emx is not recognized as a valid OS

[KO Myung-Hun]

OS part is os2-emx not emx.

* build-aux/config.sub [i*86-pc-os2-emx]: Set os to os2-emx.
---
 config.sub | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/config.sub b/config.sub
index 9bc49a7..9fb81d5 100755
--- a/config.sub
+++ b/config.sub
@@ -1292,6 +1292,10 @@ case $basic_os in
                kernel=nto
                os=`echo $basic_os | sed -e 's|nto-qnx|qnx|'`
                ;;
+       os2*)
+               kernel=
+               os=$basic_os
+               ;;
        *-*)
                # shellcheck disable=SC2162
                IFS="-" read kernel os <<EOF
-- 
2.22.0