Add libc (rust) build file.

Bug: 140201589
Test: m libc_rust
Change-Id: If84c2c3d9ff2da0c470429803fbabe84a7f650e8
diff --git a/Android.bp b/Android.bp
new file mode 100644
index 0000000..8315359
--- /dev/null
+++ b/Android.bp
@@ -0,0 +1,20 @@
+rust_library_rlib {
+    name: "libc_rust",
+    crate_name: "libc",
+    edition: "2015",
+    stem: "liblibc",
+    srcs: ["src/lib.rs"],
+    host_supported: true,
+
+    features: [
+        "std",
+        "default",
+    ],
+    flags: [
+        "--cfg libc_priv_mod_use",
+        "--cfg libc_union",
+        "--cfg libc_const_size_of",
+        "--cfg libc_align",
+        "--cfg libc_core_cvoid",
+    ],
+}