Add suppression for process_vm_readv.

On some hosts, valgrind complains about the intentional use of
process_vm_readv on invalid addresses.

Test: manually ran safe_copy_test on a VM with a 3.13 kernel
Test: m valgrind-test-art-target-gtest-safe_copy_test32 on angler
Test: m valgrind-test-art-host-gtest-safe_copy_test32 on 4.4 kernel
      (but it wasn't failing in the first place)
Change-Id: Idd4ec19cc81176eb0b880ff1363bffe0c58ec904
diff --git a/test/valgrind-suppressions.txt b/test/valgrind-suppressions.txt
index c775f98..086a856 100644
--- a/test/valgrind-suppressions.txt
+++ b/test/valgrind-suppressions.txt
@@ -69,3 +69,9 @@
    fun:_ZN12BacktraceMap6CreateEib
 }
 
+{
+   process_vm_readv
+   Memcheck:Param
+   process_vm_readv(lvec[...])
+   fun:process_vm_readv
+}
diff --git a/test/valgrind-target-suppressions.txt b/test/valgrind-target-suppressions.txt
index 452a174..0d63a1c 100644
--- a/test/valgrind-target-suppressions.txt
+++ b/test/valgrind-target-suppressions.txt
@@ -67,3 +67,10 @@
   fun:msync
   fun:_ZN3art6MemMap11MapInternalEPvmiiilb
 }
+
+{
+   process_vm_readv
+   Memcheck:Param
+   process_vm_readv(lvec[...])
+   fun:process_vm_readv
+}