libctf: get rid of a disruptive public include of <sys/param.h>

This hoary old header defines things like MAX that users of libctf might
perfectly reasonably define themselves.

The CTF headers do not need it: move it into libctf/ctf-impl.h instead.

include/
	* ctf-api.h (includes): No longer include <sys/param.h>.
libctf/
	* ctf-impl.h (includes): Include <sys/param.h> here.

include/ChangeLog

@@ -1,3 +1,7 @@
+2019-07-13  Nick Alcock  <nick.alcock@oracle.com>
+
+	* ctf-api.h (includes): No longer include <sys/param.h>.
+
 2019-07-30  Nick Alcock  <nick.alcock@oracle.com>
 
 	* ctf-api.h (ctf_link_add_cu_mapping): New.

include/ctf-api.h

@@ -24,7 +24,6 @@
 #ifndef	_CTF_API_H
 #define	_CTF_API_H
 
-#include <sys/param.h>
 #include <sys/types.h>
 #include <ctf.h>
 #include <zlib.h>

libctf/ChangeLog

@@ -1,3 +1,7 @@
+2019-07-13  Nick Alcock  <nick.alcock@oracle.com>
+
+	* ctf-impl.h (includes): Include <sys/param.h> here.
+
 2019-07-30  Nick Alcock  <nick.alcock@oracle.com>
 
 	* ctf-open.c (flip_lbls): Eschew for-loop initial declarations.

libctf/ctf-impl.h

@@ -22,6 +22,7 @@
 
 #include "config.h"
 #include <errno.h>
+#include <sys/param.h>
 #include "ctf-decls.h"
 #include <ctf-api.h>
 #include <sys/types.h>