[NTDLL][ADVAPI32][ADVAPI32_APITEST][CRYPTLIB] Add hash API exports for NT6+ and apitests with small fixes

- For NT6.0+, NTDLL exports those hash APIs that ADVAPI32 thunks forward to
- Fix undocumented context structure layout and content
- Add apitests to verify both of hash result and structure content

sdk/lib/cryptlib/sha1.c

@@ -194,5 +194,6 @@ A_SHAFinal(PSHA_CTX Context, PULONG Result)
    for (Index = 0; Index < 5; Index++)
       Result[Index] = DWORD2BE(Context->State[Index]);
 
+   memset(Context->Buffer, 0, sizeof(Context->Buffer));
    A_SHAInit(Context);
 }