MethodHandles: Write tests for MethodHandle.asCollector.

Tracks libcore change 0e8de7372de378e00c429dbf9d55526d433a7a21.

Test: make test-art-host

Change-Id: I1d7e33f1cc11104b7b015afd7d49a48f2f2c5312
diff --git a/test/957-methodhandle-transforms/expected.txt b/test/957-methodhandle-transforms/expected.txt
index 383ccd9..05b80e7 100644
--- a/test/957-methodhandle-transforms/expected.txt
+++ b/test/957-methodhandle-transforms/expected.txt
@@ -50,3 +50,12 @@
 a: a, b:b, c: c
 a: a, b:b, c: c
 a: a, b:43
+a: a, b:b, c: c
+a: a, b:true, c: false
+a: a, b:1, c: 2
+a: a, b:a, c: b
+a: a, b:3, c: 4
+a: a, b:42, c: 43
+a: a, b:100, c: 99
+a: a, b:8.9, c: 9.1
+a: a, b:6.7, c: 7.8