[LibOS] Fix incorrect default values for ISV ExtProd/family IDs.

Signed-off-by: Ao Sakurai <[email protected]>

Author: hello31337

python/graminelibos/manifest.py

@@ -306,8 +306,8 @@ def __init__(self, manifest_str):
         sgx.setdefault('isvprodid', 0)
         sgx.setdefault('isvsvn', 0)
         sgx.setdefault('kss', False)
-        sgx.setdefault('isvextprodid', 0)
-        sgx.setdefault('isvfamilyid', 0)
+        sgx.setdefault('isvextprodid', "0x00000000000000000000000000000000")
+        sgx.setdefault('isvfamilyid', "0x00000000000000000000000000000000")
         sgx.setdefault('remote_attestation', "none")
         sgx.setdefault('debug', False)
         sgx.setdefault('enable_stats', False)