make busybox --install work even if /proc/self/exe doesn't exist

# size busybox_old busybox_unstripped
   text    data     bss     dec     hex filename
 680095    2704   15648  698447   aa84f busybox_old
 680099    2704   15648  698451   aa853 busybox_unstripped

1 files changed, 1 insertions, 1 deletions

diff --git a/shell/hush.c b/shell/hush.c
index 2a4076e..40bcafd 100644
--- a/shell/hush.c
+++ b/shell/hush.c
@@ -1392,7 +1392,7 @@ static void pseudo_exec_argv(char **argv)
 			}
 			/* re-exec ourselves with the new arguments */
 			debug_printf_exec("re-execing applet '%s'\n", argv[0]);
-			execvp(CONFIG_BUSYBOX_EXEC_PATH, argv);
+			execvp(bb_busybox_exec_path, argv);
 			/* If they called chroot or otherwise made the binary no longer
 			 * executable, fall through */
 		}