hg: icedtea/jdk7/jaxp: Use ALT_DROPS_DIR to specify location of drops and extract in build directory.

[ahughes at redhat.com]

Changeset: ca47845adba8
Author:    andrew
Date:      2009-10-13 20:01 +0100
URL:       http://hg.openjdk.java.net/icedtea/jdk7/jaxp/rev/ca47845adba8

Use ALT_DROPS_DIR to specify location of drops and extract in build directory.

! build.properties
! jaxp.properties
! make/Makefile