RFR: [8040790] TEST_BUG: tools/javac/innerClassFile/Driver.sh fails to cleanup files after it

[Ivan Gerasimov]

Hello!

This is a 7u-only test-stabilization one-line fix.

The test was reported to not clean after itself, which sometimes causes 
problems.

Would you please help review the fix?

BUGURL: https://bugs.openjdk.java.net/browse/JDK-8040790
WEBREV: http://cr.openjdk.java.net/~igerasim/8040790/0/webrev/

Sincerely yours,
Ivan