Update git submodules

* Update external/boringssl from branch 'main'
  to 50c03ce14de29db51a05234a6a912c39d0708ed1
  - Merge "Remove an unnecessary include directory in Trusty build" into main
  - Remove an unnecessary include directory in Trusty build
    
    This one should not be necessary.
    
    Test: treehugger
    Change-Id: I47064f73571d5a5e04e63a526797a261f0ecb83f
    
diff --git a/external/boringssl b/external/boringssl
index 8370d81..50c03ce 160000
--- a/external/boringssl
+++ b/external/boringssl
@@ -1 +1 @@
-Subproject commit 8370d81940b764c5f664d0717c23c7d6c1442b00
+Subproject commit 50c03ce14de29db51a05234a6a912c39d0708ed1