Implemented CryptHashCertificate.

dlls/crypt32/crypt32.spec

diff --git a/dlls/crypt32/crypt32.spec b/dlls/crypt32/crypt32.spec
index 551b9ac..20b3e78 100644
--- a/dlls/crypt32/crypt32.spec
+++ b/dlls/crypt32/crypt32.spec
@@ -108,7 +108,7 @@
 @ stub CryptGetMessageSignerCount
 @ stub CryptGetOIDFunctionAddress
 @ stdcall CryptGetOIDFunctionValue(long str str wstr ptr ptr ptr)
-@ stub CryptHashCertificate
+@ stdcall CryptHashCertificate(long long long ptr long ptr ptr)
 @ stub CryptHashMessage
 @ stub CryptHashPublicKeyInfo
 @ stub CryptHashToBeSigned