Add patch for gearman [skip ci]

Author: shivammathur

src/scripts/extensions/patches/gearman.sh

@@ -0,0 +1,5 @@
+patch_gearman() {
+  if [[ "${version:?}" =~ ${nightly_versions:?} ]]; then
+    sed -i~ -e "s/zend_exception_get_default()/zend_ce_exception/" php_gearman.c
+  fi
+}