fix python testsuite failing on rawhide due to CAP_LAST_CAP

Clamp CAP_LAST_CAP at /proc/sys/kernel/cap_last_cap's value in the
Python bindings test if possible, otherwise use the value from
<linux/capability.h> since the kernel now has 37 capabilities upstream,
but our builders are not that up to date.

libcap-ng-check-proc-python.patch

@@ -0,0 +1,14 @@
+diff -Nur libcap-ng-0.7.4/bindings/python/test/capng-test.py libcap-ng-0.7.4-2/bindings/python/test/capng-test.py
+--- libcap-ng-0.7.4/bindings/python/test/capng-test.py	2014-04-24 08:41:44.000000000 -0400
++++ libcap-ng-0.7.4-2/bindings/python/test/capng-test.py	2014-06-23 13:25:20.113624203 -0400
+@@ -8,7 +8,10 @@
+     sys.path.insert(0, load_path)
+ 
+ import capng
++
+ last = capng.CAP_LAST_CAP
++with open('/proc/sys/kernel/cap_last_cap', 'r') as f:
++	last = int(f.readline())
+ 
+ print("Doing basic bit tests...")
+ capng.capng_clear(capng.CAPNG_SELECT_BOTH)

libcap-ng.spec

@@ -8,6 +8,7 @@ License: LGPLv2+
 Group: System Environment/Libraries
 URL: http://people.redhat.com/sgrubb/libcap-ng
 Source0: http://people.redhat.com/sgrubb/libcap-ng/%{name}-%{version}.tar.gz
+Patch0: libcap-ng-check-proc-python.patch
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 BuildRequires: kernel-headers >= 2.6.11 
 
@@ -50,6 +51,7 @@ lets you set the file system based capabilities.
 
 %prep
 %setup -q
+%patch0 -p1 -b .proc~
 
 %build
 %configure --libdir=/%{_lib}
@@ -111,6 +113,12 @@ rm -rf $RPM_BUILD_ROOT
 %attr(0644,root,root) %{_mandir}/man8/*
 
 %changelog
+* Mon Jun 23 2014 Kyle McMartin <kyle@redhat.com>
+- Clamp CAP_LAST_CAP at /proc/sys/kernel/cap_last_cap's value in the
+  Python bindings test if possible, otherwise use the value from
+  <linux/capability.h> since the kernel now has 37 capabilities upstream,
+  but our builders are not that up to date.
+
 * Sat Jun 07 2014 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 0.7.4-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_21_Mass_Rebuild