Initial import of libdpf.

Co-authored-by: Cursor <cursoragent@cursor.com>

thirdparty/hedley/test/const.c

@@ -0,0 +1,11 @@
+#include "../hedley.h"
+
+HEDLEY_CONST
+HEDLEY_INLINE
+static int test_const(int a, int b) {
+  return a * b;
+}
+
+int main(void) {
+  return test_const(9, 9);
+}