external/boringssl: Sync to e34bcc91.

This includes the following changes:

https://boringssl.googlesource.com/boringssl/+log/0e9138d295cd556e830dc8b3be735e808680f4bd..e34bcc91c07c0bf65ecc53a814d51f5246007150

This also removes BORINGSSL_ENABLE_RC4_TLS and android_compat_hacks.c as
they are no longer needed.

Test: Built tree, phone boots. Ran cts-tradefed run cts -m CtsLibcoreTestCases
Change-Id: I86df196e1856c338bbf72c60e2e47dd1b74ae537
diff --git a/src/util/all_tests.go b/src/util/all_tests.go
index d361651..a937c8c 100644
--- a/src/util/all_tests.go
+++ b/src/util/all_tests.go
@@ -104,7 +104,7 @@
 }
 
 func valgrindOf(dbAttach bool, path string, args ...string) *exec.Cmd {
-	valgrindArgs := []string{"--error-exitcode=99", "--track-origins=yes", "--leak-check=full"}
+	valgrindArgs := []string{"--error-exitcode=99", "--track-origins=yes", "--leak-check=full", "--quiet"}
 	if dbAttach {
 		valgrindArgs = append(valgrindArgs, "--db-attach=yes", "--db-command=xterm -e gdb -nw %f %p")
 	}