archivers/py-liblzma: Fix horrible malloc.h handling

The source was including <stdlib.h>, then checking if system is FreeBSD
(among a long list of system) in order to include <stdlib.h> again
instead of <malloc.h>, never minding that "opting-in" for a standard.

Just patch out the whole macro mess, it's not needed and it fixes the
build on a malloc.h-less DragonFly

Approved by:	just fix it

archivers/py-liblzma/files/patch-src_liblzma.h

@@ -0,0 +1,16 @@
+--- src/liblzma.h.orig	2010-02-20 23:07:31 UTC
++++ src/liblzma.h
+@@ -8,13 +8,6 @@
+ #include <Python.h>
+ #include <stdio.h>
+ #include <stdlib.h>
+-#if defined (__APPLE__) || defined(__FreeBSD__) || \
+-    defined(__OpenBSD__) || defined(__NetBSD__) || \
+-    defined (__sun) || defined (__svr4__)
+-#include <stdlib.h>
+-#else
+-#include <malloc.h>
+-#endif
+ #include <string.h>
+ #include <inttypes.h>
+ #if !defined(linux) && !defined(__sun) && !defined(__svr4__)