Fix Long reverse intrinsic comment

Test: TreeHugger only
Change-Id: I8823e8d9a9db88ed280f9d968184153543697f39
diff --git a/runtime/interpreter/interpreter_intrinsics.cc b/runtime/interpreter/interpreter_intrinsics.cc
index 681a582..022b139 100644
--- a/runtime/interpreter/interpreter_intrinsics.cc
+++ b/runtime/interpreter/interpreter_intrinsics.cc
@@ -91,7 +91,7 @@
 // java.lang.Integer.signum(I)I
 UNARY_INTRINSIC(MterpIntegerSignum, Signum, GetVReg, SetI);
 
-// java.lang.Long.reverse(I)I
+// java.lang.Long.reverse(J)J
 UNARY_INTRINSIC(MterpLongReverse, ReverseBits64, GetVRegLong, SetJ);
 
 // java.lang.Long.reverseBytes(J)J