Add missing dir to create_testsuite_files script

* scripts/create_testsuite_files: Add special_functions to the list
	of directories to search. Add comment referring to conformance.exp.
	* testsuite/libstdc++-dg/conformance.exp: Add comment referring
	to create_testsuite_files.

From-SVN: r266146

libstdc++-v3/ChangeLog

@@ -1,3 +1,10 @@
+2018-11-14  Jonathan Wakely  <jwakely@redhat.com>
+
+	* scripts/create_testsuite_files: Add special_functions to the list
+	of directories to search. Add comment referring to conformance.exp.
+	* testsuite/libstdc++-dg/conformance.exp: Add comment referring
+	to create_testsuite_files.
+
 2018-11-13  Jonathan Wakely  <jwakely@redhat.com>
 
 	* src/c++17/memory_resource.cc (select_num_pools): Fix off-by-one

libstdc++-v3/scripts/create_testsuite_files

@@ -31,8 +31,10 @@ tests_file_perf="$outdir/testsuite_files_performance"
 cd $srcdir
 # This is the ugly version of "everything but the current directory".  It's
 # what has to happen when find(1) doesn't support -mindepth, or -xtype.
+# The directories here should be consistent with libstdc++-dg/conformance.exp
 dlist=`echo [0-9][0-9]*`
 dlist="$dlist abi backward ext performance tr1 tr2 decimal experimental"
+dlist="$dlist special_functions"
 find $dlist "(" -type f -o -type l ")" -name "*.cc" -print > $tmp.01
 find $dlist "(" -type f -o -type l ")" -name "*.c" -print > $tmp.02
 cat  $tmp.01 $tmp.02 | sort > $tmp.1

libstdc++-v3/testsuite/libstdc++-dg/conformance.exp

@@ -52,6 +52,7 @@ if {[info exists tests_file] && [file exists $tests_file]} {
     close $f
 } else {
     # Find directories that might have tests.
+    # This list should be consistent with scripts/create_testsuite_files
     set subdirs [glob "$srcdir/\[0-9\]\[0-9\]*"]
     lappend subdirs "$srcdir/abi"
     lappend subdirs "$srcdir/backward"