Move personality parser to a separate file

* personality.c: New file.
* Makefile.am (strace_SOURCES): Add it.
* system.c: Move sys_personality and related code to personality.c.

Makefile.am

@@ -41,6 +41,7 @@ strace_SOURCES =	\
 	net.c		\
 	or1k_atomic.c	\
 	pathtrace.c	\
+	personality.c	\
 	process.c	\
 	ptp.c		\
 	quota.c		\

personality.c

@@ -0,0 +1,13 @@
+#include "defs.h"
+
+#include <linux/personality.h>
+
+#include "xlat/personality_options.h"
+
+int
+sys_personality(struct tcb *tcp)
+{
+	if (entering(tcp))
+		printxval(personality_options, tcp->u_arg[0], "PER_???");
+	return 0;
+}

system.c

@@ -60,8 +60,6 @@
 #define MS_MGC_VAL	0xc0ed0000	/* Magic flag number */
 #define MS_MGC_MSK	0xffff0000	/* Magic flag mask */
 
-#include <linux/personality.h>
-
 #include "xlat/mount_flags.h"
 
 int
@@ -119,15 +117,3 @@ sys_umount2(struct tcb *tcp)
 	}
 	return 0;
 }
-
-/* These are not macros, but enums.  We just copy the values by hand
-   from Linux 2.6.9 here.  */
-#include "xlat/personality_options.h"
-
-int
-sys_personality(struct tcb *tcp)
-{
-	if (entering(tcp))
-		printxval(personality_options, tcp->u_arg[0], "PER_???");
-	return 0;
-}