headers: allow CryptGenRandom in Win10 19H1 UWP builds

It's allowed by the WACK and in api-ms-win-security-cryptoapi-l1-1-0
since the 18362/19H1 SDK.

Signed-off-by: LIU Hao <lh_mouse@126.com>

mingw-w64-headers/include/wincrypt.h

diff --git a/mingw-w64-headers/include/wincrypt.h b/mingw-w64-headers/include/wincrypt.h
index e60e3cd..05fd577 100644
--- a/mingw-w64-headers/include/wincrypt.h
+++ b/mingw-w64-headers/include/wincrypt.h
@@ -778,7 +778,7 @@
   WINIMPM WINBOOL WINAPI CryptAcquireContextW (HCRYPTPROV *phProv, LPCWSTR szContainer, LPCWSTR szProvider, DWORD dwProvType, DWORD dwFlags);
 #define CryptAcquireContext __MINGW_NAME_AW(CryptAcquireContext)
 #endif
-#if WINAPI_FAMILY_PARTITION (WINAPI_PARTITION_DESKTOP) || defined(WINSTORECOMPAT)
+#if WINAPI_FAMILY_PARTITION (WINAPI_PARTITION_DESKTOP) || NTDDI_VERSION >= NTDDI_WIN10_19H1 || defined(WINSTORECOMPAT)
   WINIMPM WINBOOL WINAPI CryptGenRandom (HCRYPTPROV hProv, DWORD dwLen, BYTE *pbBuffer);
 #endif
 #if WINAPI_FAMILY_PARTITION (WINAPI_PARTITION_APP)