[librsvg] Oops, add the build file for lalrpop

[Federico Mena Quintero <federico src gnome org>]

commit a394b7fc1ee56081268718bce0396c40288776f5
Author: Federico Mena Quintero <federico gnome org>
Date:   Wed Mar 22 16:26:16 2017 -0600

    Oops, add the build file for lalrpop

 rust/build.rs  |    5 +++++
 rust/src/pt.rs |    1 +
 2 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/rust/build.rs b/rust/build.rs
new file mode 100644
index 0000000..23c7d3f
--- /dev/null
+++ b/rust/build.rs
@@ -0,0 +1,5 @@
+extern crate lalrpop;
+
+fn main() {
+    lalrpop::process_root().unwrap();
+}
diff --git a/rust/src/pt.rs b/rust/src/pt.rs
new file mode 100644
index 0000000..741a23a
--- /dev/null
+++ b/rust/src/pt.rs
@@ -0,0 +1 @@
+pub extern crate cairo;