[8u] RFR (XS) 8080082: configure fails if you create an empty directory and then run configure from it

[Aleksey Shipilev]

Original fix:
   https://bugs.openjdk.java.net/browse/JDK-8080082
   https://hg.openjdk.java.net/jdk9/jdk9/rev/2038a6987213

This is a follow up for JDK-8079891 backport. There are no changes, but generated-configure.sh needs 
merging with current state of 8u.

8u webrev:
   https://cr.openjdk.java.net/~shade/8080082/webrev.8u.01/

Testing: running ./configure from empty dir (used to fail, now passes)

-- 
Thanks,
-Aleksey