Update git submodules

* Update swift from branch 'master'
  to eb567b21429ae85be24ce92cd326357c11e97aaa
  - Merge "max_request_line: add probe test assertions"
  - max_request_line: add probe test assertions

    The existing test_signals probe test provides a convenient place to
    make some assertions about modified constraints.

    Related-Change: Icb2920bf975c7a1dfc7368380b54e99ba1ebcd2c
    Change-Id: I37173a733212cd253d27437aecee9e2b379366c6
    Signed-off-by: Alistair Coles <alistairncoles@gmail.com>

diff --git a/swift b/swift
index 6e6658c796c9117664282588c259881dd58cf801..eb567b21429ae85be24ce92cd326357c11e97aaa 160000 (submodule)
--- a/swift
+++ b/swift
@@ -1 +1 @@
-Subproject commit 6e6658c796c9117664282588c259881dd58cf801
+Subproject commit eb567b21429ae85be24ce92cd326357c11e97aaa