[roll] Roll fuchsia [magma] Add context APIs to msd_c.h

Original-Bug:344958350

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1161977
Original-Revision: 6dad161220aeb5677f3bbe8467040450ee0cdf69
GitOrigin-RevId: cf9f84dfd6e1bd78ff3f890729ede87d2f0b8074
Change-Id: Ied7b5ff93984cf8f75202f34d38aed4d42aaf62e

Author: C Stout

stem

@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="16cfd2780910c71915080b5338e3347fc978c048"/>
+             revision="6dad161220aeb5677f3bbe8467040450ee0cdf69"/>
   </projects>
   <hooks>
     <hook name="install-environment"