[fix] install event extension using PECL

(pickle errors on latest version '3.0.2r1' due to unrecognizable version string format)

Signed-off-by: Dorian Savina <[email protected]>

Author: dsavina

extensions/core/event/install.sh

@@ -3,6 +3,7 @@
 set -e
 # Sockets is required for event extension to work.
 #export EXTENSION="sockets"
+export USE_PECL=1
 export PECL_EXTENSION="event"
 export DEV_DEPENDENCIES="libevent-dev libssl-dev"
 export DEPENDENCIES="libevent-2.1-7 libevent-core-2.1-7 libevent-extra-2.1-7 libevent-openssl-2.1-7 libevent-pthreads-2.1-7 libssl1.1"