php: security bump to version 5.6.22

Fixes:
Core: Integer Overflow in php_html_entities
Core: Integer underflow / arbitrary null write in fread/gzread
GD: imagescale out-of-bounds read
Intl: get_icu_value_internal out-of-bounds read

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2 files changed