Install ext/json headers so that other extension can parse, too

Author: johannes

ext/json/config.m4

@@ -15,7 +15,7 @@ PHP_NEW_EXTENSION(json,
 	  json_parser.tab.c \
 	  json_scanner.c,
 	  $ext_shared,, -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1)
-  PHP_INSTALL_HEADERS([ext/json], [php_json.h])
+  PHP_INSTALL_HEADERS([ext/json], [php_json.h php_json_parser.h php_json_scanner.h])
   PHP_ADD_MAKEFILE_FRAGMENT()
   PHP_SUBST(JSON_SHARED_LIBADD)
 fi