fix include search
Merge branch 'PHP-5.6'

* PHP-5.6:
  fix include search
made libgd recognize the 9 version series
Merge branch 'PHP-5.5' into PHP-5.6

* PHP-5.5:
  made libgd recognize the 9 version series
Merge branch 'PHP-5.6'

* PHP-5.6:
  made libgd recognize the 9 version series