Fix supporting in external curl
Fix supporting in external curl

This line must be in this script for handling the "-DCURL_INCLUDE_DIR=" parameter.
If not the function for searching for curl won't be activated and won't be updated in the makefile.
MariaDB/mariadb-connector-c,ottok/mariadb-connector-c,MariaDB/mariadb-connector-c,MariaDB/mariadb-connector-c,ottok/mariadb-connector-c,ottok/mariadb-connector-c