please unblock ruby1.8/1.8.7.72-3 and ruby1.9/1.9.0.2-9

[akira yamada <akira@debian.org>]

ruby{1.8,1.9}/testing fix important bugs.
Please unblock.

ruby1.8/1.8.7.72-3:
 - fixed regression of the fix of DoS vulnerability in REXML. (CVE-2008-3790) (ref: #502535)
 - Class#dup should copy constants into the duplicated class. (closes: #506344)

ruby1.9/1.9.0.2-9:
 - fixed regression of the fix of DoS vulnerability in REXML. (CVE-2008-3790) (ref: #502535)
 - fixed segmentation fault bug in Regexp#inspect