Add support for more expressive SD card permissions

We now run an sdcard fuse daemon on top of a physical SD card.
Add support for that.

Bug: 10330128

Change-Id: I6a291f861ccb0f2911c07cc8f659e2cec4e6d76c
diff --git a/cryptfs.h b/cryptfs.h
index 421181e..162159e 100644
--- a/cryptfs.h
+++ b/cryptfs.h
@@ -127,8 +127,10 @@
    char crypto_blkdev[256];
    char label[256];
 };
-#define VOL_NONREMOVABLE 0x1
-#define VOL_ENCRYPTABLE  0x2
+#define VOL_NONREMOVABLE   0x1
+#define VOL_ENCRYPTABLE    0x2
+#define VOL_PRIMARY        0x4
+#define VOL_PROVIDES_ASEC  0x8
 
 #ifdef __cplusplus
 extern "C" {