vts: fix ProcZoneInfoTest test failure

Linux kernel has prevent to print nr_indirectly_reclaimable in below commit.
It lead to no string printed when to print the last line of per-node stats.
Add compatible item to match such case.

commit d62b8ac8cd540c39a10d94c1fe5389f994a82e1a
Author: Roman Gushchin <guro@fb.com>
Date:   Fri May 11 16:01:53 2018 -0700

    mm: don't show nr_indirectly_reclaimable in /proc/vmstat

    commit 7aaf7727235870f497eb928f728f7773d6df3b40 upstream.

    Don't show nr_indirectly_reclaimable in /proc/vmstat, because there is
    no need to export this vm counter to userspace, and some changes are
    expected in reclaimable object accounting, which can alter this counter.

    Link: http://lkml.kernel.org/r/20180425191422.9159-1-guro@fb.com

Change-Id: I386e674db09dcbbda1f31d1043d382f7c9f6bbc2
Signed-off-by: Zhang Bo <bo.zhang@nxp.com>
diff --git a/api/proc/ProcZoneInfoTest.py b/api/proc/ProcZoneInfoTest.py
index dda233d..0b0f159 100644
--- a/api/proc/ProcZoneInfoTest.py
+++ b/api/proc/ProcZoneInfoTest.py
@@ -73,8 +73,12 @@
         p[0] = p[1]
 
     def p_line(self, p):
-        'line : STRING NUMBER NEWLINE'
-        p[0] = p[1:3]
+        '''line : STRING NUMBER NEWLINE
+                | NUMBER NEWLINE'''
+        if len(p) == 4:
+            p[0] = p[1:3]
+        else:
+            p[0] = p[1]
 
     def p_cpu(self, p):
         'cpu : CPU COLON NUMBER NEWLINE colonline colonline colonline \