tests: handle the case when all 64 process capability bits are set

* tests/caps.awk: Handle the case when all bits of 64-bit capability
word are set.
diff --git a/tests/caps.awk b/tests/caps.awk
index 3db69c5..70f3147 100644
--- a/tests/caps.awk
+++ b/tests/caps.awk
@@ -1,7 +1,7 @@
 BEGIN {
   fail = 0
   lines = 3
-  cap = "(0|CAP_[A-Z_]+(\\|CAP_[A-Z_]+)*)"
+  cap = "(0|CAP_[A-Z_]+(\\|CAP_[A-Z_]+)*|CAP_[A-Z_]+(\\|CAP_[A-Z_]+){37}\\|0xffffffc0)"
   capget = "^capget\\(\\{_LINUX_CAPABILITY_VERSION_3, 0\\}, \\{" cap ", " cap ", " cap "\\}\\) = 0$"
 }