libgo: simplify gotest script to avoid sed substitution to \n

Reviewed-on: https://go-review.googlesource.com/c/145057

From-SVN: r265541

gcc/go/gofrontend/MERGE

@@ -1,4 +1,4 @@
-9785e5c4e868ba55efdb33fc51872b4821770167
+8902fb43c569e4d3ec5bd143bfa8cb6bf2836780
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.

libgo/testsuite/gotest

@@ -521,13 +521,8 @@ symtogo() {
     if ! expr "$s" : '^[^.]*\.[^.]*$' >/dev/null 2>&1; then
       continue
     fi
-    if [ -z "${result}" ]; then
-      result="${s}"
-    else
-      result="${result} ${s}"
-    fi
+    echo "$s"
   done
-  echo "$result" | sed -e 's/ /\n/g'
 }
 
 {