Update the submodule to the head of PR in the framework repository

See Mbed-TLS/mbedtls-framework#23

Signed-off-by: Michael Schuster <michael@schuster.ms>
diff --git a/framework b/framework
index 331565b..d4177eb 160000
--- a/framework
+++ b/framework
@@ -1 +1 @@
-Subproject commit 331565b041f794df2da76394b3b0039abce30355
+Subproject commit d4177eb503c908e2cdc1d00277df51f898156b60