fs/binfmt_em86.c: fix incompatible pointer type

Since the -Wincompatible-pointer-types is reported as error, alpha
doesn't build anymore. Let's fix it in a minimal way.

fs/binfmt_em86.c:73:35: error: passing argument 2 of `copy_strings_kernel' from incompatible pointer type [-Werror=incompatible-pointer-types]
retval = copy_strings_kernel(1, &i_arg, bprm);
^ ^
fs/binfmt_em86.c:77:34: error: passing argument 2 of `copy_strings_kernel' from incompatible pointer type [-Werror=incompatible-pointer-types]
retval = copy_strings_kernel(1, &i_name, bprm);
^

Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Daniel Wagner <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

fs/binfmt_em86.c

···
 
 static int load_em86(struct linux_binprm *bprm)
 {
-	char *interp, *i_name, *i_arg;
+	const char *i_name, *i_arg;
+	char *interp;
 	struct file * file;
 	int retval;
 	struct elfhdr	elf_ex;