Fix shell usage.

acinclude.m4

@@ -297,8 +297,7 @@ dnl Internal macro for CURL_CONFIGURE_REENTRANT.
 
 AC_DEFUN([CURL_CHECK_NEED_REENTRANT_SYSTEM], [
   case $host in
-    *-*-solaris*)
-    *-*-hpux*)
+    *-*-solaris* | *-*-hpux*)
       tmp_need_reentrant="yes"
       ;;
     *)