ktest: Add support for meta characters in GRUB_MENU

ktest fails if meta characters are in GRUB_MENU, for example
GRUB_MENU = 'Fedora (test)'

The failure happens because the meta characters are not escaped,
so the menu doesn't match in any entries in GRUB_FILE.

Use quotemeta() to escape the meta characters.

Link: http://lkml.kernel.org/r/20190417235823.18176-1-msys.mizuma@gmail.comSigned-off-by: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>

tools/testing/ktest/ktest.pl

@@ -1878,9 +1878,10 @@ sub get_grub2_index {
 	or dodie "unable to get $grub_file";
 
     my $found = 0;
+    my $grub_menu_qt = quotemeta($grub_menu);
 
     while (<IN>) {
-	if (/^menuentry.*$grub_menu/) {
+	if (/^menuentry.*$grub_menu_qt/) {
 	    $grub_number++;
 	    $found = 1;
 	    last;
@@ -1921,9 +1922,10 @@ sub get_grub_index {
 	or dodie "unable to get menu.lst";
 
     my $found = 0;
+    my $grub_menu_qt = quotemeta($grub_menu);
 
     while (<IN>) {
-	if (/^\s*title\s+$grub_menu\s*$/) {
+	if (/^\s*title\s+$grub_menu_qt\s*$/) {
 	    $grub_number++;
 	    $found = 1;
 	    last;