Add back missing TypeConverter that got removed in last commit

Also bump API snapshot with the latest changes.

diff --git a/external/api-snapshot b/external/api-snapshot
index 89019f5e816873237f1f2c4ce5bb4279b0f0c790..032ea9507a680d80ba17c2594868647301d1893f 160000 (submodule)
--- a/external/api-snapshot
+++ b/external/api-snapshot
@@ -1 +1 @@
-Subproject commit 89019f5e816873237f1f2c4ce5bb4279b0f0c790
+Subproject commit 032ea9507a680d80ba17c2594868647301d1893f

diff --git a/external/corefx b/external/corefx
index 02ff1b070a5f1dc581686627fafe467274731c11..66465f7b9147ebbcb0fec50f4b538188627c2867 160000 (submodule)
--- a/external/corefx
+++ b/external/corefx
@@ -1 +1 @@
-Subproject commit 02ff1b070a5f1dc581686627fafe467274731c11
+Subproject commit 66465f7b9147ebbcb0fec50f4b538188627c2867