...by folding the contents of java_accessibility.jar back into
java_uno_accessbridge.jar.

In the old build system there were two jars, java_uno_accessbridge.jar
containing the handful of org.openoffice.accessibility classes and all
org.openoffice.java.accessibility classes (though how the latter got included
was fairly obscure in the makefile.mk) and unused java_accessibility.jar that
contained all org.openoffice.java.accessibility classes.  When adapting this to
gbuild, the unused java_accessibility.jar was carried over, but all its
org.openoffice.accessibility classes were inadvertently droped from
java_uno_accessbridge.jar.

Change-Id: I9b582ba22667b1dae635828e85c4cc5b530353ac