Update case of basetsd.h import to support cross compilation
diff --git a/gen/src/include.rs b/gen/src/include.rs
index 54a359f..1688a4e 100644
--- a/gen/src/include.rs
+++ b/gen/src/include.rs
@@ -61,7 +61,7 @@
     pub type_traits: bool,
     pub utility: bool,
     pub vector: bool,
-    pub base_tsd: bool,
+    pub basetsd: bool,
 }
 
 impl Includes {
@@ -122,9 +122,9 @@
         if self.vector {
             writeln!(f, "#include <vector>")?;
         }
-        if self.base_tsd {
+        if self.basetsd {
             writeln!(f, "#if defined(_WIN32)")?;
-            writeln!(f, "#include <BaseTsd.h>")?;
+            writeln!(f, "#include <basetsd.h>")?;
             writeln!(f, "#endif")?;
         }
         Ok(())