Ignore an aio cond variable oddity

tools/dev/valgrind/libc.suppr

@@ -23,6 +23,14 @@
 }
 
 {
+   Ignore libc aio-internal cond oddity
+   Helgrind:Misc
+   ...
+   fun:aio_read
+   ...
+}
+
+{
    Ignore libc aio-internal races
    Helgrind:Race
    ...
@@ -31,6 +39,14 @@
 }
 
 {
+   Ignore libc aio-internal cond oddity
+   Helgrind:Misc
+   ...
+   fun:aio_write
+   ...
+}
+
+{
    Ignore libc aio-internal races
    Helgrind:Race
    ...