Meta: Add install-ports CMake target

install-ports copys the necessary files from Ports/ to /usr/Ports. Also
refactor the compiler and destiation variables from .port_include.sh
into .hosted_defs.sh. .hosted_defs.sh does not exists when ports are
built in serenity

Meta/install-ports-tree.sh

@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+
+SERENITY_PORTS_DIR="${SERENITY_ROOT}/Build/${SERENITY_ARCH}/Root/usr/Ports"
+
+for file in $(git ls-files "${SERENITY_ROOT}/Ports"); do
+    if [ "$(basename "$file")" != ".hosted_defs.sh" ]; then
+        target=${SERENITY_PORTS_DIR}/$(realpath --relative-to="${SERENITY_ROOT}/Ports" "$file")
+        mkdir -p "$(dirname "$target")" && cp "$file" "$target"
+    fi
+done

Meta/lint-ports.py

@@ -14,7 +14,8 @@ IGNORE_FILES = {
     PORT_TABLE_FILE,
     'build_all.sh',
     'build_installed.sh',
-    'README.md'
+    'README.md',
+    '.hosted_defs.sh'
 }