debug/strace: fix strace 4.5.19 to properly build with latest Linux kernels

Here's a couple of patches to get strace 4.5.19 to configure and build
properly with the latest kernel headers. Not pretty, but hopefully
enough while we wait for 4.5.20 to be released.

With the current strace-4.5.19 patches I failed to get the configure
script running even on my host environment. Also, when cross building
the configure script needs to look for the proper system headers to be
able to properly set HAVE_LINUX_NETLINK_H. Otherwise you get:

[EXTRA] Building strace
[ERROR] /home/jocke/x-tools/targets/src/strace-4.5.19/net.c:976:
error: field 'nl' has incomplete type
[ERROR] make[2]: *** [net.o] Error 1
[ERROR] make[1]: *** [all] Error 2

The fix was simple, backport a change set from the git[1] tree and run
autoreconf to update the configure script.

[1] - http://strace.git.sourceforge.net/git/gitweb.cgi?p=strace/strace;a=commit;h=f0df31e71a58c6e79ba77c1a9d84b2f38d44bec7

 This is the README for crosstool-NG

 TABLE OF CONTENT /

 ________________/

   - GETTING STARTED

   - CREDITS

   - KNOWN ISSUES

 GETTING STARTED /

 _______________/

 To get you started, just enter:

   ./configure --help

 You can find a (terse and WIP) documentation in docs/overview.txt.

 Here's a summary of what you'll find in there:

   Introduction

   History

   Installing crosstool-NG

   Configuring crosstool-NG

   Running crosstool-NG

   Using the toolchain

   Toolchain types

   Contributing

   Internals

 You can also point your browser at:

   http://ymorin.is-a-geek.org/projects/crosstool

 CREDITS /

 _______/

 The people that helped are listed in docs/CREDITS. Many thanks to them! :-)

 KNOWN ISSUES /

 ____________/

 The list of known issues is listed in docs/known-issues.txt.

 Aloha!