Fix valgrind tests with Debian's debugperl
Fix valgrind tests with Debian's debugperl

With Debian's debugperl, the test for -DDEBUGGING fails, so make an
exception. See Debian bug #332629.

pombredanne/apache-lucy,nwellnhof/lucy,kidaa/lucy,kidaa/lucy,pombredanne/apache-lucy,rectang/lucy,rbevers/lucy,rbevers/lucy,pombredanne/apache-lucy,apache/lucy,rectang/lucy,nwellnhof/lucy,kidaa/lucy,kidaa/lucy,rectang/lucy,kidaa/lucy,nwellnhof/lucy,apache/lucy,nwellnhof/lucy,rbevers/lucy,pombredanne/apache-lucy,rectang/lucy,rbevers/lucy,pombredanne/apache-lucy,rectang/lucy,nwellnhof/lucy,kidaa/lucy,apache/lucy,rbevers/lucy,pombredanne/apache-lucy,apache/lucy,rbevers/lucy,nwellnhof/lucy,apache/lucy,rbevers/lucy,apache/lucy,nwellnhof/lucy,kidaa/lucy,apache/lucy,rectang/lucy,rectang/lucy,pombredanne/apache-lucy,kidaa/lucy