Implement Bazel build

To run the tests:

  bazel test //...

To build the Gerrit plugin API, run:

  bazel build gerrit-plugin-api:plugin-api_deploy.jar

To build the Gerrit extension API, run:

  bazel build gerrit-extension-api:extension-api_deploy.jar

TODOs:

Licenses
Reduce visibility (all public for now)
Generate HTML Documentation
Core plugins
gerrit_plugin() rule to build plugins in tree and standalone modes
GWT UI (only gwt_module() skylark rule is provided, no gwt_binary())
PolyGerrit UI
WAR
Publish artifacts to Maven Central
Ask Bazel team to add Gerrit to their CI on ci.bazel.io

Contributed-By: Han-Wen Nienhuys <hanwen@google.com>
Change-Id: I9a86e670882a44a5c966579cdeb8ed79b1590de3
diff --git a/lib/httpcomponents/BUILD b/lib/httpcomponents/BUILD
new file mode 100644
index 0000000..74ab00a
--- /dev/null
+++ b/lib/httpcomponents/BUILD
@@ -0,0 +1,29 @@
+java_library(
+  name = 'fluent-hc',
+  exports = ['@fluent_hc//jar'],
+  runtime_deps = [':httpclient'],
+  visibility = ['//visibility:public'],
+)
+
+java_library(
+  name = 'httpclient',
+  exports = ['@httpclient//jar'],
+  runtime_deps = [
+    '//lib/commons:codec',
+    ':httpcore',
+    '//lib/log:jcl-over-slf4j',
+  ],
+  visibility = ['//visibility:public'],
+)
+
+java_library(
+  name = 'httpcore',
+  exports = ['@httpcore//jar'],
+  visibility = ['//visibility:public'],
+)
+
+java_library(
+  name = 'httpmime',
+  exports = ['@httpmime//jar'],
+  visibility = ['//visibility:public'],
+)