ppp: update to version 2.4.7.git-2019-05-18

c9d9dbf pppoe: Custom host-uniq tag
44012ae plugins/rp-pppoe: Fix compile errors

Refresh patches
Drop 520-uniq patch as upstream accepted
Drop 150-debug_compile_fix patch as fixed upstream

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>

package/network/services/ppp/patches/400-simplify_kernel_checks.patch

@@ -125,7 +125,7 @@ Signed-off-by: Jo-Philipp Wich <jo@mein.io>
  char *pppd_pppoe_service = NULL;
  static char *acName = NULL;
  static char *existingSession = NULL;
-@@ -372,10 +369,6 @@ PPPoEDevnameHook(char *cmd, char **argv,
+@@ -385,10 +382,6 @@ PPPoEDevnameHook(char *cmd, char **argv,
  void
  plugin_init(void)
  {