Fix More 3.6 async parsing

... all from 3.6 test_coroutines.py.

More bugs remain

test/simple_source/bug36/03_async_from_coroutine.py

@@ -0,0 +1,39 @@
+# These are from 3.6 test_coroutines.py
+async def iterate(gen):
+    res = []
+    async for i in gen:
+        res.append(i)
+    return res
+
+def test_comp_5(f):
+    # async def f(it):
+    #     for i in it:
+    #         yield i
+
+    async def run_list():
+        return [i
+                for
+                pair in
+                ([10, 20])
+                async for i
+                in f
+                ]
+
+async def test2(x, buffer, f):
+    with x:
+        async for i in f:
+            if i:
+                break
+        else:
+            buffer()
+    buffer()
+
+async def test3(x, buffer, f):
+    with x:
+        async for i in f:
+            if i:
+                continue
+            buffer()
+        else:
+            buffer.append()
+    buffer()

uncompyle6/parsers/parse36.py

@@ -135,7 +135,7 @@ class Python36Parser(Python35Parser):
                                POP_BLOCK JUMP_FORWARD COME_FROM_EXCEPT DUP_TOP
                                LOAD_GLOBAL COMPARE_OP POP_JUMP_IF_TRUE
                                END_FINALLY COME_FROM
-                               for_block
+                               for_block _come_froms
                                POP_TOP POP_TOP POP_TOP POP_EXCEPT POP_TOP
                                POP_BLOCK
                                else_suite COME_FROM_LOOP

uncompyle6/semantics/customize36.py

@@ -67,7 +67,7 @@ def customize_for_version36(self, version):
                 "%|async for %c in %c:\n%+%c%-%|else:\n%+%c%-\n\n",
                 (9, "store"),
                 (1, "expr"),
-                (-9, "for_block"),
+                (-10, "for_block"),
                 (-2, "else_suite"),
             ),
             "call_ex":            ("%c(%p)", (0, "expr"), (1, 100)),