- Disable output of empty header files

- Remove incorrect header styles
- Use export.replace where header style was previously needed
- Check compilation of tests using system gcc

src/header/sys_wait/cbindgen.toml

@@ -1,8 +1,8 @@
 sys_includes = ["sys/types.h", "sys/resource.h"]
 include_guard = "_SYS_WAIT_H"
-style = "Type"
 trailer = "#include <bits/sys/wait.h>"
 language = "C"
+style = "Tag"
 
 [enum]
 prefix_with_name = true