Ports: Fix dependency install when port name is not port folder name

There was a bug in the way the `.port_include.sh` script handled
installing dependencies. According to the
[documentation](https://github.com/SerenityOS/serenity/tree/master/Ports#depends)
the depends array should have port names in it. The port system allows
for the name of the port to be different from the folder where port
lives. Previously the `installdepends` function would cd to the name
of the port, now it will find and run the `package.sh` that has the
line `port=$depend` in it.

Ports/.port_include.sh

@@ -491,7 +491,7 @@ package_install_state() {
 installdepends() {
     for depend in "${depends[@]}"; do
         if [ -z "$(package_install_state $depend)" ]; then
-            (cd "../$depend" && ./package.sh --auto)
+            (cd "$(dirname $(grep -E port=${depend} ../*/package.sh))" && ./package.sh --auto)
         fi
     done
 }