Update clang-sys to 1.3.1

Test: cd external/rust/crates && atest --host -c
Change-Id: Icb1706e6da583698ed05663a1dbd5ec10bd00593
diff --git a/Cargo.toml.orig b/Cargo.toml.orig
index e04a103..a78a106 100644
--- a/Cargo.toml.orig
+++ b/Cargo.toml.orig
@@ -3,7 +3,7 @@
 name = "clang-sys"
 authors = ["Kyle Mayes <kyle@mayeses.com>"]
 
-version = "1.2.2"
+version = "1.3.1"
 
 readme = "README.md"
 license = "Apache-2.0"
@@ -31,6 +31,8 @@
 clang_9_0 = ["clang_8_0"]
 clang_10_0 = ["clang_9_0"]
 clang_11_0 = ["clang_10_0"]
+clang_12_0 = ["clang_11_0"]
+clang_13_0 = ["clang_12_0"]
 
 runtime = ["libloading"]
 static = []
@@ -47,4 +49,4 @@
 
 [package.metadata.docs.rs]
 
-features = ["clang_11_0", "runtime"]
+features = ["clang_13_0", "runtime"]