tests: Fix merge error in Makefile.am

Commit de2bf46 ("api,doc,tests: Add SCMP_ACT_TRAPX()")
had a simple typo where 64-live-trapx.tests was erroneously
merged as 63-live-trapx.tests in the EXTRA_DISTS field.
Update this entry to correctly be 64-live-trapx.tests

Signed-off-by: Tom Hromatka (Oracle) <tom.hromatka@gmail.com>

Author: drakenclimber

tests/Makefile.am

@@ -230,7 +230,7 @@ EXTRA_DIST_TESTCFGS = \
 	61-sim-transactions.tests \
 	62-sim-arch_transactions.tests \
 	63-live-notify_addfd.tests \
-	63-live-trapx.tests
+	64-live-trapx.tests
 
 EXTRA_DIST_TESTSCRIPTS = \
 	38-basic-pfc_coverage.sh 38-basic-pfc_coverage.pfc \