noticed by Wolfgang Friebel
p4raw-id: //depot/perl@32632
# Debian/Ubuntu have /usr/lib/libgdbm_compat.so.3* but not this file,
# so linking may fail
-if (-e '/usr/lib/libgdbm_compat.so') {
+if (-e '/usr/lib/libgdbm_compat.so' or -e '/usr/lib64/libgdbm_compat.so') {
$self->{LIBS}->[0] .= ' -lgdbm_compat';
}