hg: jdk/jdk: 8208744: remove unneeded -DUSE_MMAP settings for JDK native libs builds

[matthias.baesken at sap.com]

Changeset: 10ef3d870cb7
Author:    mbaesken
Date:      2018-08-03 07:59 +0200
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/10ef3d870cb7

8208744: remove unneeded -DUSE_MMAP settings for JDK native libs builds
Reviewed-by: ihse, martin, alanb, dholmes

! make/lib/Lib-jdk.jdi.gmk
! make/lib/Lib-jdk.jdwp.agent.gmk