minor symfony#20481 [Validator] Added missing swedish translation (Nyholm)

This PR was submitted for the master branch but it was merged into the 2.7 branch instead (closes symfony#20481).

Discussion
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[Validator] Added missing swedish translation

| Q             | A
| ------------- | ---
| Branch?       | "master"
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | n/a
| License       | MIT
| Doc PR        | n/a

I've checked our major banks websites and we have no better word for "Business Identifier Code" than "BIC". Some banks used "BIC-code" so that is what I wrote here.

Commits
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f3fede2 [Validator] Added missing swedish translation

Author: fabpot

src/Symfony/Component/Validator/Resources/translations/validators.sv.xlf

@@ -310,6 +310,10 @@
                 <source>This value does not match the expected {{ charset }} charset.</source>
                 <target>Detta värde har inte den förväntade teckenkodningen {{ charset }}.</target>
             </trans-unit>
+            <trans-unit id="81">
+                <source>This is not a valid Business Identifier Code (BIC).</source>
+                <target>Detta är inte en giltig BIC-kod.</target>
+            </trans-unit>
         </body>
     </file>
 </xliff>