setgcc: error message

The bash script tried to verify the existence of a file,
but there were several fils fitting the wildcard expression.
So, [ -e .../*gcc ]; was interpreted as if it had too many
arguments.  Replaced that expression by a count of files.

Fixes #8493.

data/bin/setgcc

@@ -79,7 +79,8 @@ if [ -z "$gcc" ]; then
 fi
 
 # check whether the gcc exists
-if [ ! -e $abiDir/$arch/$gcc/tools/current/bin/*gcc ]; then
+count=`ls $abiDir/$arch/$gcc/tools/current/bin/*gcc 2>/dev/null | wc -l`
+if [ $count -eq 0 ]; then
 	echo "Can't set GCC $arch/$gcc -- not installed." >&2
 	exit 1
 fi