external/boringssl: Sync to c4796c92e0aced2342ed5687201aea07189c3bc1.

This includes the following changes:

https://boringssl.googlesource.com/boringssl/+log/040bc4944be97f5d4b44da176f6e801fc804a176..c4796c92e0aced2342ed5687201aea07189c3bc1

Test: CtsLibcoreTestCases Presubmits
Change-Id: If6d911660fbd9c60896527addb277c8225c3d401
diff --git a/src/crypto/CMakeLists.txt b/src/crypto/CMakeLists.txt
index bbc68d0..fbfc4b2 100644
--- a/src/crypto/CMakeLists.txt
+++ b/src/crypto/CMakeLists.txt
@@ -129,7 +129,6 @@
   thread_none.c
   thread_pthread.c
   thread_win.c
-  time_support.c
 
   $<TARGET_OBJECTS:stack>
   $<TARGET_OBJECTS:lhash>
@@ -212,9 +211,12 @@
 add_executable(
   crypto_test
 
+  chacha/chacha_test.cc
   dh/dh_test.cc
   dsa/dsa_test.cc
+  ec/ec_test.cc
   err/err_test.cc
+  rsa/rsa_test.cc
 
   $<TARGET_OBJECTS:gtest_main>
   $<TARGET_OBJECTS:test_support>