RFR: JDK-8081858 make dist-clean does not delete all log files

[Magnus Ihse Bursie]

"make dist-clean" leaves build.log and configure.log behind, as well as 
the rotated .old files.

Bug: https://bugs.openjdk.java.net/browse/JDK-8081858
WebRev: 
http://cr.openjdk.java.net/~ihse/JDK-8081858-fix-dist-clean/webrev.01

/Magnus