Suppress a memory leak in libselinux.so/getdelim

It happens even on `ls`

TBR=glider
Review URL: http://codereview.chromium.org/7063018

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@86418 0039d316-1c4b-4281-b951-d872f2087c98

tools/valgrind/memcheck/suppressions.txt

@@ -4626,3 +4626,12 @@
    fun:call_init
    fun:_dl_init
 }
+{
+   bug_todo_getdelim2
+   Memcheck:Leak
+   fun:malloc
+   fun:getdelim
+   obj:/lib/libselinux.so.1
+   obj:/lib/libselinux.so.1
+   obj:/lib/libselinux.so.1
+}