enum: Don't directly include enum.h

To allow enum.h to depend on utils.h definitions, avoid its direct inclusion.
Instead include utils.h, which includes enum.h as well.

src/libstrongswan/utils/debug.h

@@ -26,7 +26,7 @@ typedef enum level_t level_t;
 
 #include <stdio.h>
 
-#include "utils/enum.h"
+#include <utils/utils.h>
 
 /**
  * Debug message group.

src/libstrongswan/utils/enum.c

@@ -17,6 +17,7 @@
 #include <stdio.h>
 
 #include <library.h>
+#include <utils/utils.h>
 
 #include "enum.h"
 

src/libstrongswan/utils/utils.h

@@ -29,9 +29,6 @@
 #include <arpa/inet.h>
 #include <string.h>
 
-#include "enum.h"
-#include "utils/strerror.h"
-
 /**
  * strongSwan program return codes
  */
@@ -73,6 +70,9 @@
 # define TRUE  true
 #endif /* TRUE */
 
+#include "enum.h"
+#include "utils/strerror.h"
+
 /**
  * Helper function that compares two strings for equality
  */