bpo-35926: Add support for OpenSSL 1.1.1b on Windows (GH-11779)

diff --git a/PCbuild/openssl.props b/PCbuild/openssl.props
index 8c78cd4..a7e1679 100644
--- a/PCbuild/openssl.props
+++ b/PCbuild/openssl.props
@@ -11,7 +11,8 @@
   </ItemDefinitionGroup>
   <PropertyGroup>
     <_DLLSuffix>-1_1</_DLLSuffix>
-    <_DLLSuffix Condition="$(Platform) == 'x64'">$(_DLLSuffix)-x64</_DLLSuffix>
+    <_DLLSuffix Condition="$(Platform) == 'ARM'">$(_DLLSuffix)-arm</_DLLSuffix>
+    <_DLLSuffix Condition="$(Platform) == 'ARM64'">$(_DLLSuffix)-arm64</_DLLSuffix>
   </PropertyGroup>
   <ItemGroup>
     <_SSLDLL Include="$(opensslOutDir)\libcrypto$(_DLLSuffix).dll" />