add include for missing localeconv_r proto
C89 compat
Merge branch 'PHP-5.5' into PHP-5.6

* PHP-5.5:
  C89 compat
  add include for missing localeconv_r proto
Merge branch 'PHP-5.6'

* PHP-5.6:
  C89 compat
  add include for missing localeconv_r proto