libsepol: require threads

libsepol 2.7 now uses <pthread.h>

Fixes:

  http://autobuild.buildroot.net/results/5f1c6872a395d8c6d55e2b1722730871b4daf6a3

Signed-off-by: Adam Duskett <aduskett@gmail.com>
Tested-by: Matt Weber <matthew.weber@rockwellcollins.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libsepol/Config.in

@@ -1,7 +1,11 @@
 config BR2_PACKAGE_LIBSEPOL
 	bool "libsepol"
+	depends on BR2_TOOLCHAIN_HAS_THREADS # pthread
 	help
 	  Libsepol is the binary policy manipulation library. It doesn't
 	  depend upon or use any of the other SELinux components.
 
 	  http://selinuxproject.org/page/Main_Page
+
+comment "libsepol needs a toolchain w/ threads"
+	depends on !BR2_TOOLCHAIN_HAS_THREADS

package/semodule-utils/Config.in

@@ -1,5 +1,6 @@
 config BR2_PACKAGE_SEMODULE_UTILS
 	bool "semodule-utils"
+	depends on BR2_TOOLCHAIN_HAS_THREADS # libsepol
 	select BR2_PACKAGE_LIBSEPOL
 	help
 	  semodule-utils is a package that contains tools for handling
@@ -13,3 +14,6 @@ config BR2_PACKAGE_SEMODULE_UTILS
 	  * semodule_package - Create a SELinux policy module package.
 
 	  https://github.com/SELinuxProject/selinux/wiki/Releases
+
+comment "semodule-utils needs a toolchain w/ threads"
+	depends on !BR2_TOOLCHAIN_HAS_THREADS