fix some indention-with-spaces that crept in

src/linux/dup3.c

@@ -4,7 +4,7 @@
 #include "syscall.h"
 
 int dup3(int old, int new, int flags) {
-        int r;
-        while ((r=__syscall(SYS_dup3, old, new, flags))==-EBUSY);
-        return __syscall_ret(r);
+	int r;
+	while ((r=__syscall(SYS_dup3, old, new, flags))==-EBUSY);
+	return __syscall_ret(r);
 }

src/linux/setns.c

@@ -5,5 +5,5 @@
 
 int setns(int fd, int nstype)
 {
-        return syscall(SYS_setns, fd, nstype);
+	return syscall(SYS_setns, fd, nstype);
 }