Update git submodules

* Update trusty/user/app/sample from branch 'master'
  to a5c3ef369cb5852e8fd32c442a426d774ef8470f
  - [skel_rust] Add log statement
    
    Adds a simple info!() call to test the Trusty logging backend.
    
    Test: build.py, run and check output manually
    Bug: 193278312
    Change-Id: Idd58031ca232b5b86e5df986b128c9ca2713069d
    

* Update trusty/user/base from branch 'master'
  to 4c13f286e6e6ac0f4c8ebefe2f01e927d120a624
  - [rust] Log backend
    
    Adds a simple backend for the Rust log crate that prints log output to
    standard error.
    
    Test: build.py
    Bug: 193278312
    Change-Id: Ifdce8533780401f5ccd73e22abe24d151222acde
    
  - [rust] Add log and cfg-if crate build files
    
    Adds build rules for the log and cfg-if external crates. These rules
    must be manually updated if necessary when rolling the crates forward.
    
    Test: build.py
    Bug: 193278312
    Change-Id: I70a406003d63def180ec6999c0e853221049d81f
    
diff --git a/trusty/user/app/sample b/trusty/user/app/sample
index 4cd13d1..a5c3ef3 160000
--- a/trusty/user/app/sample
+++ b/trusty/user/app/sample
@@ -1 +1 @@
-Subproject commit 4cd13d1e31bfd62d8287ce8233fbef70a2586cce
+Subproject commit a5c3ef369cb5852e8fd32c442a426d774ef8470f
diff --git a/trusty/user/base b/trusty/user/base
index 73a51aa..4c13f28 160000
--- a/trusty/user/base
+++ b/trusty/user/base
@@ -1 +1 @@
-Subproject commit 73a51aa5b38aa4994c09d3084308e14ce752804f
+Subproject commit 4c13f286e6e6ac0f4c8ebefe2f01e927d120a624