inet_socket and mmap patches

Here are 4 patches that fix failures I have came across in recently added tests: "inet_socket" and "mmap" on RHEL distros.

I have tested this series on:

                   i386   x86_64   ia64   ppc64   ppc64le   s390x
RHEL5.6/11           *      *        *      *       N/A       *
RHEL6.2/4/5/6/7      *      *       N/A     *       N/A       *
RHEL7.0/1/2         N/A     *       N/A     *        *        *

I have hit one known kernel issue on RHEL7.0/1:
Bug 1102641 - BUG: It is not possible to communicate between local
program and local ipv6 address when at least one 'netlabelctl unlbl' rule is added
https://bugzilla.redhat.com/show_bug.cgi?id=1102641

This didn't prevent tests from completing, but since harness we use is using IPv6 by default, it was getting stuck on connect after test completed.

Other than this one known kernel issue, all tests have passed.

Jan Stancek (4):
tests/inet_socket: check 'ip xfrm policy ctx' support
inet_socket: secon: use current pid mmap/mprotect_heap: make sure memory is allocated from heap mmap/mprotect_file_private_execmod: clear READ_IMPLIES_EXEC

 tests/inet_socket/ipsec-load               |  4 ++--
 tests/inet_socket/test                     | 31 ++++++++++++++++++------------
 tests/mmap/mprotect_file_private_execmod.c | 13 +++++++++++++
 tests/mmap/mprotect_heap.c                 |  9 ++++++++-
 4 files changed, 42 insertions(+), 15 deletions(-)

1.8.3.1