external/boringssl: Sync to 9770532afa91dd1441ba0d3e9d4bb86d7e501f19.

This includes the following changes:

https://boringssl.googlesource.com/boringssl/+log/915c121bb5d424e09bf05c3aabf172a44e958e28..9770532afa91dd1441ba0d3e9d4bb86d7e501f19

Test: BoringSSL CTS Presubmits
Change-Id: Ie17b7876e646e842f5d71ffeed0ba4be248a434e
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 95e2590..7862307 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -355,8 +355,8 @@
 
 # Add minimal googletest targets. The provided one has many side-effects, and
 # googletest has a very straightforward build.
-add_library(gtest third_party/googletest/src/gtest-all.cc)
-target_include_directories(gtest PRIVATE third_party/googletest)
+add_library(boringssl_gtest third_party/googletest/src/gtest-all.cc)
+target_include_directories(boringssl_gtest PRIVATE third_party/googletest)
 
 include_directories(third_party/googletest/include)