hg: jdk7/tl/langtools: 6962540: langtools Makefile sets DEV_NULL incorrectly

[jonathan . gibbons]

Changeset: 0ba1f80b73a5
Author:    jjg
Date:      2010-06-18 16:45 -0700
URL:       http://hg.openjdk.java.net/jdk7/tl/langtools/rev/0ba1f80b73a5

6962540: langtools Makefile sets DEV_NULL incorrectly
Reviewed-by: ohair

! make/Makefile