Added missing system libraries and headers for bazel.

Change-Id: I966d28dd5a6677acc73c608a89efa30f8358b0dd
diff --git a/debian/BUILD.usr b/debian/BUILD.usr
new file mode 100644
index 0000000..0815609
--- /dev/null
+++ b/debian/BUILD.usr
@@ -0,0 +1,25 @@
+package(default_visibility = ['//visibility:public'])
+
+cc_library(
+  name = 'librt',
+  srcs = [ 'lib/x86_64-linux-gnu/librt.so' ],
+)
+
+cc_library(
+  name = 'libdl',
+  srcs = [ 'lib/x86_64-linux-gnu/libdl.so' ],
+)
+
+cc_library(
+  name = 'libm',
+  srcs = [ 'lib/x86_64-linux-gnu/libm.so' ],
+)
+
+cc_library(
+  name = 'libpthread',
+  srcs = [ 'lib/x86_64-linux-gnu/libpthread.so' ],
+  linkopts = [
+    '-pthread',
+  ],
+)
+