tests: Follow up on qemucaps2xmldata rename

The directory has been renamed in 56299084, but a
reference to it was not updated at the same time, causing
'make dist' to fail ever since. Fix it.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>

tests/Makefile.am

@@ -122,7 +122,7 @@ EXTRA_DIST = \
 	qemuargv2xmldata \
 	qemublocktestdata \
 	qemucapabilitiesdata \
-	qemucaps2xmldata \
+	qemucaps2xmloutdata \
 	qemuhotplugtestcpus \
 	qemuhotplugtestdevices \
 	qemuhotplugtestdomains \