Add a test for issue #400.

That's not the same as actually fixing it, but I'm at a loss about how
exactly to do that.

test/el-get-issue-400.el

@@ -0,0 +1,12 @@
+;; https://github.com/dimitri/el-get/issues/400
+;;
+;; el-get-install does not run the init hooks
+
+(let ((debug-on-error t)
+      (el-get-verbose t))
+      ;; (el-get-sources '((:name php-mode :features php-mode))))
+  (require 'el-get)
+  (el-get 'sync 'php-mode-improved)
+  (message "auto-mode-alist: %S" (rassoc 'php-mode auto-mode-alist))
+  (with-current-buffer (find-file "foo.php")
+    (message "%s: %s" (buffer-file-name) major-mode)))

test/foo.php

@@ -0,0 +1,3 @@
+<?
+# PHP test file for issue 400 and auto-mode-alist testing.
+?>