Bazel: update BoringSSL to aa8d29d / e0b5388 (master-with-bazel).

This update includes the following changes:

aa8d29dbd Tidy up dsa_sign_setup.
53d9fdd54 Fix the build on glibc 2.15.
749d18706 Modernize OPENSSL_COMPILE_ASSERT.
127a1ec08 Fix redefinition of AEAD asserts in e_aes.c.
b64c53fcf Guard sys/auxv.h include on !BORINGSSL_ANDROID.
35fb591f2 Flatten EVP_AEAD_CTX
c0c900144 Implement SSL_get_tlsext_status_type
6f579c0e9 Fix documentation sectioning.
cbfe4f5a8 Remove support for GCC 4.7.
dd412c428 Print the name of the binary when blocking in getrandom.
f8a894684 Undo recent changes to |X509V3_EXT_conf_nid|.

Change-Id: Iaa343b1779a5ae421de3150e76e3f64b92a0d6ea
Signed-off-by: Piotr Sikora <piotrsikora@google.com>
Reviewed-on: https://nginx-review.googlesource.com/c/3561
Reviewed-by: Wayne Zhang <qiwzhang@google.com>

build.bzl

diff --git a/build.bzl b/build.bzl
index 8a6560b..78409de 100644
--- a/build.bzl
+++ b/build.bzl
@@ -602,7 +602,7 @@
 def nginx_repositories_boringssl(bind):
     native.git_repository(
         name = "boringssl",
-        commit = "a200d149ee3587a4db7df92e9c527e7b4c64bdc3",  # 2018-10-16
+        commit = "e0b538807057da4f5642ded5fa1d06c7f4b8f90a",  # 2018-10-25
         remote = "https://boringssl.googlesource.com/boringssl",
     )