Bazel: fix Brotli build with recent versions of Clang/GCC.

Change-Id: I7a9f563cf1acb9007197f003dc0c025a73d57e85
Signed-off-by: Piotr Sikora <piotrsikora@google.com>
Reviewed-on: https://nginx-review.googlesource.com/c/nginx/+/4003
Reviewed-by: Patryk Lesiewicz <patryk@google.com>

bazel/external/brotli.patch

diff --git a/bazel/external/brotli.patch b/bazel/external/brotli.patch
new file mode 100644
index 0000000..755ee43
--- /dev/null
+++ b/bazel/external/brotli.patch
@@ -0,0 +1,12 @@
+--- BUILD
++++ BUILD
+@@ -18,6 +18,9 @@
+     "-Wlong-long",
+     "-Wmissing-declarations",
+     "-Wmissing-prototypes",
++    "-Wno-implicit-int-float-conversion",
+     "-Wno-strict-aliasing",
++    "-Wno-unknown-warning-option",
++    "-Wno-vla-parameter",
+     "-Wshadow",
+     "-Wsign-compare",

bazel/repositories.bzl

diff --git a/bazel/repositories.bzl b/bazel/repositories.bzl
index 0090c5a..16176d0 100644
--- a/bazel/repositories.bzl
+++ b/bazel/repositories.bzl
@@ -85,4 +85,5 @@
         commit = "222564a95d9ab58865a096b8d9f7324ea5f2e03e",  # 2016-12-02
         remote = "https://github.com/google/brotli.git",
         shallow_since = "1480681940 +0100",
+        patches = ["@nginx//bazel/external:brotli.patch"],
     )