Check for kinfo_getfile on FreeBSD

Code in sysdeps/freebsd contains a lot of HAVE_KINFO_GETFILE checks, but
the macro is always undefined because the configure script doesn't check
for it. To fix it, add required checks for kinfo_getfile function.

configure.ac

@@ -215,7 +215,9 @@ AC_TYPE_SIGNAL
 AC_FUNC_STRFTIME
 AC_CHECK_FUNCS(getcwd gettimeofday getwd putenv strdup strtoul uname)
 
-AM_GNU_GETTEXT_VERSION([0.19.4])
+# FIXME: Remove AM_GNU_GETTEXT_VERSION once autoreconf supports REQUIRE_VERSION
+AM_GNU_GETTEXT_VERSION([0.19.6])
+AM_GNU_GETTEXT_REQUIRE_VERSION([0.19.6])
 AM_GNU_GETTEXT([external])
 
 GETTEXT_PACKAGE=libgtop-2.0

glibtop.h

@@ -128,7 +128,7 @@ glibtop_init_r (glibtop **server_ptr,
 
 
 /**
- * glibtop_init_s:
+ * glibtop_init_s: (skip)
  * @server_ptr: (out):
  * @features:
  * @flags:

libgtop-sysdeps.m4

@@ -118,6 +118,9 @@ AC_DEFUN([GNOME_LIBGTOP_SYSDEPS],[
 	  AC_CHECK_LIB(kvm, kvm_open, KVM_LIBS=-lkvm, KVM_LIBS=)
 	  AC_SUBST(KVM_LIBS)
 
+	  AC_CHECK_LIB(util, kinfo_getfile)
+	  AC_CHECK_FUNCS(kinfo_getfile)
+
 	  AC_CHECK_HEADERS(net/if_var.h,,, [
 #include <net/if.h>
 #include <sys/types.h>