infect: Move thread_ctx structure into infect

For now it's becoming the part of the compel API and lets
us remove parasite-syscall.h from infect.c. The former header
includes declarations of CRIU dumping routines that work with
parasite code.
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

criu/include/infect.h

@@ -31,7 +31,10 @@ extern int compel_unseize_task(pid_t pid, int orig_state, int state);
 #define TASK_ZOMBIE		0x6
 
 struct parasite_ctl;
-struct thread_ctx;
+struct thread_ctx {
+	k_rtsigset_t		sigmask;
+	user_regs_struct_t	regs;
+};
 
 extern struct parasite_ctl *compel_prepare(int pid);
 extern int compel_infect(struct parasite_ctl *ctl, unsigned long nr_threads, unsigned long args_size);

criu/include/parasite-syscall.h

@@ -22,11 +22,6 @@ struct pid;
 struct parasite_dump_cgroup_args;
 struct rt_sigframe;
 
-struct thread_ctx {
-	k_rtsigset_t		sigmask;
-	user_regs_struct_t	regs;
-};
-
 struct parasite_ctl;
 
 extern int parasite_dump_sigacts_seized(struct parasite_ctl *ctl, struct cr_imgset *cr_imgset);

criu/infect-rpc.c

 #include "xmalloc.h"
 #include "types.h"
-#include "parasite-syscall.h"
 #include "log.h"
 #include "common/bug.h"
 #include "lock.h"

criu/infect.c

@@ -8,7 +8,6 @@
 
 #include "infect.h"
 #include "ptrace.h"
-#include "asm/parasite-syscall.h"
 #include "restorer.h"
 #include "parasite-syscall.h"
 #include "pie-relocs.h"