[Runtime] Rename swift_unknown* functions to swift_unknownObject*.

These functions don't accept local variable heap memory, although the names make it sound like they work on anything. When you try, they mistakenly identify such things as ObjC objects, call through to the equivalent objc_* function, and crash confusingly. This adds Object to the name of each one to make it more clear what they accept.

rdar://problem/37285743

Author: mikeash

docs/Runtime.md

@@ -110,28 +110,28 @@ Returns a random number. Only used by allocation profiling tools.
 000000000001ce50 T _swift_retain_n
 000000000001d140 T _swift_tryPin
 000000000001d240 T _swift_tryRetain
-0000000000027b10 T _swift_unknownRelease
-0000000000027a70 T _swift_unknownRelease_n
-0000000000027ad0 T _swift_unknownRetain
-0000000000027a10 T _swift_unknownRetain_n
-0000000000027d50 T _swift_unknownUnownedAssign
-00000000000280a0 T _swift_unknownUnownedCopyAssign
-0000000000027fd0 T _swift_unknownUnownedCopyInit
-0000000000027ed0 T _swift_unknownUnownedDestroy
-0000000000027cb0 T _swift_unknownUnownedInit
-0000000000027f20 T _swift_unknownUnownedLoadStrong
-00000000000281f0 T _swift_unknownUnownedTakeAssign
-0000000000028070 T _swift_unknownUnownedTakeInit
-0000000000027f70 T _swift_unknownUnownedTakeStrong
-00000000000282b0 T _swift_unknownWeakAssign
-0000000000028560 T _swift_unknownWeakCopyAssign
-00000000000284e0 T _swift_unknownWeakCopyInit
-00000000000283e0 T _swift_unknownWeakDestroy
-0000000000028270 T _swift_unknownWeakInit
-0000000000028420 T _swift_unknownWeakLoadStrong
-0000000000028610 T _swift_unknownWeakTakeAssign
-0000000000028520 T _swift_unknownWeakTakeInit
-0000000000028470 T _swift_unknownWeakTakeStrong
+0000000000027b10 T _swift_unknownObjectRelease
+0000000000027a70 T _swift_unknownObjectRelease_n
+0000000000027ad0 T _swift_unknownObjectRetain
+0000000000027a10 T _swift_unknownObjectRetain_n
+0000000000027d50 T _swift_unknownObjectUnownedAssign
+00000000000280a0 T _swift_unknownObjectUnownedCopyAssign
+0000000000027fd0 T _swift_unknownObjectUnownedCopyInit
+0000000000027ed0 T _swift_unknownObjectUnownedDestroy
+0000000000027cb0 T _swift_unknownObjectUnownedInit
+0000000000027f20 T _swift_unknownObjectUnownedLoadStrong
+00000000000281f0 T _swift_unknownObjectUnownedTakeAssign
+0000000000028070 T _swift_unknownObjectUnownedTakeInit
+0000000000027f70 T _swift_unknownObjectUnownedTakeStrong
+00000000000282b0 T _swift_unknownObjectWeakAssign
+0000000000028560 T _swift_unknownObjectWeakCopyAssign
+00000000000284e0 T _swift_unknownObjectWeakCopyInit
+00000000000283e0 T _swift_unknownObjectWeakDestroy
+0000000000028270 T _swift_unknownObjectWeakInit
+0000000000028420 T _swift_unknownObjectWeakLoadStrong
+0000000000028610 T _swift_unknownObjectWeakTakeAssign
+0000000000028520 T _swift_unknownObjectWeakTakeInit
+0000000000028470 T _swift_unknownObjectWeakTakeStrong
 000000000001d3c0 T _swift_unownedCheck
 000000000001cfb0 T _swift_unownedRelease
 000000000001d0a0 T _swift_unownedRelease_n