Import 'clang-sys' package version 0.29.3

* Add OWNERS
* No Android.bp yet
Bug: 152884384
Test: make

Change-Id: I1d652df9a2f868b46957554a8ade394acbfe7af0
diff --git a/ci/test_script.bat b/ci/test_script.bat
new file mode 100644
index 0000000..2928409
--- /dev/null
+++ b/ci/test_script.bat
@@ -0,0 +1,2 @@
+set RUST_BACKTRACE=1
+cargo test --verbose --features %CLANG_VERSION% -- --nocapture