php: Add 7.1.0

1)Add php_7.1.0.bb
2)Delete php_5.5.38.bb,since it is replaced by php_5.6.26.bb.
3)Move pthread-check-threads-m4.patch out of 7.1.0, since it is integrated upstream.

Signed-off-by: Huang Qiyu <huangqy.fnst@cn.fujitsu.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>

meta-oe/recipes-devtools/php/php.inc

@@ -24,7 +24,6 @@ SRC_URI_append_class-target = " \
             file://php-fpm.conf \
             file://php-fpm-apache.conf \
             file://configure.patch \
-            file://pthread-check-threads-m4.patch \
             file://70_mod_php5.conf \
             file://php-fpm.service \
           "