minor symfony#17664 [Routing] added a suggestion to add the HttpFoundation component. (hhamon)

This PR was merged into the 2.7 branch.

Discussion
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[Routing] added a suggestion to add the HttpFoundation component.

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | ~
| License       | MIT
| Doc PR        | ~

Commits
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a45e8bb [Routing] added a suggestion to add the HttpFoundation component.

Author: fabpot

src/Symfony/Component/Routing/composer.json

@@ -31,6 +31,7 @@
         "symfony/config": "<2.7"
     },
     "suggest": {
+        "symfony/http-foundation": "For using a Symfony Request object",
         "symfony/config": "For using the all-in-one router or any loader",
         "symfony/yaml": "For using the YAML loader",
         "symfony/expression-language": "For using expression matching",