libyang MAINTENANCE headers includes cleanup

iwyu_tool.py used
diff --git a/src/schema_compile_node.c b/src/schema_compile_node.c
index bf2f209..9221ab4 100644
--- a/src/schema_compile_node.c
+++ b/src/schema_compile_node.c
@@ -29,7 +29,7 @@
 #include "compat.h"
 #include "dict.h"
 #include "log.h"
-#include "plugins_exts.h"
+#include "plugins.h"
 #include "plugins_exts_compile.h"
 #include "plugins_internal.h"
 #include "plugins_types.h"