gdc-test.exp (gdc-do-test): Sort and remove duplicate options in permute args tests.

gcc/testsuite/ChangeLog:

2019-03-26  Iain Buclaw  <ibuclaw@gdcproject.org>

	* gdc.test/gdc-test.exp (gdc-do-test): Sort and remove duplicate
	options in permute args tests.

From-SVN: r269937

gcc/testsuite/ChangeLog

+2019-03-26  Iain Buclaw  <ibuclaw@gdcproject.org>
+
+	* gdc.test/gdc-test.exp (gdc-do-test): Sort and remove duplicate
+	options in permute args tests.
+
 2019-03-26  Paolo Carlini  <paolo.carlini@oracle.com>
 
 	PR c++/84598

gcc/testsuite/gdc.test/gdc-test.exp

@@ -393,7 +393,7 @@ proc gdc-do-test { } {
 	if { $dir == "runnable" } {
 	    append PERMUTE_ARGS " $SHARED_OPTION"
 	}
-	set options [gdc-permute-options $PERMUTE_ARGS]
+	set options [gdc-permute-options [lsort -unique $PERMUTE_ARGS]]
 
 	switch $dir {
 	    runnable {