[LyX/master] Remove bash construct

[Georg Baum]

commit 1e4700b277bedf2f28a8fe9a9565afc31bffee3e
Author: Georg Baum <b...@lyx.org>
Date:   Sat May 16 11:11:08 2015 +0200

    Remove bash construct
    
    Now it should work with any sh compatible shell

diff --git a/src/tests/test_layout b/src/tests/test_layout
index d82c48e..d031981 100755
--- a/src/tests/test_layout
+++ b/src/tests/test_layout
@@ -6,7 +6,8 @@ do
        echo Testing $i...
        dn=`dirname $i`
        bn=`basename $i .layout`
-       if ! ./check_layout ${dn}/${bn}; then
+       ./check_layout ${dn}/${bn}
+       if [ $? -ne 0 ]; then
                retval=1
        fi
 done