[PHP-GCOV] Build error - PHP_HEAD (2019-03-28)

[PHP GCOV]

>>> File: ext/interbase/ibase_events.c Function: (top level):204 [og] (undefined reference to `TSRMLS_FETCH_FROM_CTX') Function: (top level):329 [og] (undefined reference to `TSRMLS_SET_CTX') Function: (top level):204 [og] (undefined reference to `TSRMLS_FETCH_FROM_CTX') Function: (top level):329 [og] (undefined reference to `TSRMLS_SET_CTX') Function: (top level):204 [og] (undefined reference to `TSRMLS_FETCH_FROM_CTX') Function: (top level):329 [og] (undefined reference to `TSRMLS_SET_CTX') Function: (top level):204 [og] (undefined reference to `TSRMLS_FETCH_FROM_CTX') Function: (top level):329 [og] (undefined reference to `TSRMLS_SET_CTX')