Add seasocks BUILD

Change-Id: Id3bc6092c546efb0ee9da8347d59d375263a5447
diff --git a/third_party/seasocks/BUILD b/third_party/seasocks/BUILD
new file mode 100644
index 0000000..57e0c01
--- /dev/null
+++ b/third_party/seasocks/BUILD
@@ -0,0 +1,13 @@
+licenses(['notice'])
+
+cc_library(
+  name = 'seasocks',
+  visibility = ['//visibility:public'],
+  srcs = glob(['src/main/c/**/*.cpp']),
+  hdrs = glob([
+    'src/main/c/**/*.h',
+  ], [
+    'src/main/internal/**/*',
+  ]),
+  includes = ['src/main/c'],
+)