ARM/ARM64: Implement numberOfLeadingZeros intrinsic.

Change-Id: I4042fb7a0b75140475dcfca23e8f79d310f5333b
diff --git a/compiler/optimizing/intrinsics_x86.cc b/compiler/optimizing/intrinsics_x86.cc
index 0d6ca09..993c005 100644
--- a/compiler/optimizing/intrinsics_x86.cc
+++ b/compiler/optimizing/intrinsics_x86.cc
@@ -1756,6 +1756,8 @@
 UNIMPLEMENTED_INTRINSIC(StringGetCharsNoCheck)
 UNIMPLEMENTED_INTRINSIC(SystemArrayCopyChar)
 UNIMPLEMENTED_INTRINSIC(ReferenceGetReferent)
+UNIMPLEMENTED_INTRINSIC(IntegerNumberOfLeadingZeros)
+UNIMPLEMENTED_INTRINSIC(LongNumberOfLeadingZeros)
 
 #undef UNIMPLEMENTED_INTRINSIC