pan/ltp-pan.c: add statistics about not fully tested testcases

Currently numbers of testcases in LTP will return TCONF when they are not
appropriate to run. But when users execute './runltp' to run the default
test suite towards an linux distribution or upstream kernel, if testcases
return TCONF, ultimately they will print TPASS to users, then users will
not know the real LTP test coverage.

NOTE: The overall test status would be TCONF even if just one test assertion
      reported TCONF, which is not ideall but still far better than the
      previous state.

Here we change this behaviour and show users testcases which return TCONF,
meaning that these testcases are not fully tested.

Here is a sample:
1. Before this patch, The output will be:
Test Start Time: Tue Jun 24 14:32:15 2014
-----------------------------------------
Testcase                       Result     Exit Value
--------                       ------     ----------
access01                       PASS       0
access02                       PASS       0
access03                       PASS       0
getxattr01                     PASS       0
getxattr02                     PASS       0
access04                       PASS       0
ext4-nsec-timestamps           PASS       0
ext4-uninit-groups             PASS       0
access05                       PASS       0
access06                       PASS       0

-----------------------------------------------
Total Tests: 10
Total Failures: 0
Kernel Version: 3.16.0-rc1+
Machine Architecture: x86_64
Hostname: localhost.localdomain

2. After this patch, the output will be:
Test Start Time: Tue Jun 24 14:28:27 2014
-----------------------------------------
Testcase                       Result     Exit Value
--------                       ------     ----------
access01                       PASS       0
access02                       PASS       0
access03                       PASS       0
getxattr01                     CONF       32
getxattr02                     CONF       32
access04                       PASS       0
ext4-nsec-timestamps           CONF       32
ext4-uninit-groups             CONF       32
access05                       PASS       0
access06                       PASS       0

-----------------------------------------------
Total Tests: 10
Total Skipped Tests: 4
Total Failures: 0
Kernel Version: 3.16.0-rc1+
Machine Architecture: x86_64
Hostname: localhost.localdomain

Signed-off-by: Xiaoguang Wang <wangxg.fnst@cn.fujitsu.com>
Reviewed-by: Cyril Hrubis <chrubis@suse.cz>
syscalls/rt_sigprocmask01: Fix race.

Since the sig_count was declared static the compiler is more eager in
optimization (it does not expect the value to change because it cannot
see the signal handler side effect) which causes the test to fail.

Declare the sig_count as volatile sig_atomic_t which fixes the failure
on x86_64.

Signed-off-by: Cyril Hrubis <chrubis@suse.cz>