BoringSSL integration: non-vsprojects changes

Author: ctiller

.gitmodules

@@ -1,10 +1,6 @@
 [submodule "third_party/zlib"]
 	path = third_party/zlib
 	url = https://github.com/madler/zlib
-[submodule "third_party/openssl"]
-	path = third_party/openssl
-	url = https://github.com/openssl/openssl.git
-	branch = OpenSSL_1_0_2-stable
 [submodule "third_party/protobuf"]
 	path = third_party/protobuf
 	url = https://github.com/google/protobuf.git
@@ -15,3 +11,6 @@
 [submodule "third_party/googletest"]
 	path = third_party/googletest
 	url = https://github.com/google/googletest.git
+[submodule "third_party/boringssl"]
+	path = third_party/boringssl
+	url = https://boringssl.googlesource.com/boringssl

BUILD

@@ -149,6 +149,7 @@ cc_library(
     "src/core/security/security_context.h",
     "src/core/tsi/fake_transport_security.h",
     "src/core/tsi/ssl_transport_security.h",
+    "src/core/tsi/ssl_types.h",
     "src/core/tsi/transport_security.h",
     "src/core/tsi/transport_security_interface.h",
     "src/core/census/grpc_filter.h",
@@ -1242,6 +1243,7 @@ objc_library(
     "src/core/security/security_context.h",
     "src/core/tsi/fake_transport_security.h",
     "src/core/tsi/ssl_transport_security.h",
+    "src/core/tsi/ssl_types.h",
     "src/core/tsi/transport_security.h",
     "src/core/tsi/transport_security_interface.h",
     "src/core/census/grpc_filter.h",