bpo-36941: Windows build changes for Windows ARM64 (GH-13365)

diff --git a/PCbuild/_ssl.vcxproj b/PCbuild/_ssl.vcxproj
index 522f80a..4907f49 100644
--- a/PCbuild/_ssl.vcxproj
+++ b/PCbuild/_ssl.vcxproj
@@ -5,6 +5,10 @@
       <Configuration>Debug</Configuration>
       <Platform>ARM</Platform>
     </ProjectConfiguration>
+    <ProjectConfiguration Include="Debug|ARM64">
+      <Configuration>Debug</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
     <ProjectConfiguration Include="Debug|Win32">
       <Configuration>Debug</Configuration>
       <Platform>Win32</Platform>
@@ -17,6 +21,10 @@
       <Configuration>PGInstrument</Configuration>
       <Platform>ARM</Platform>
     </ProjectConfiguration>
+    <ProjectConfiguration Include="PGInstrument|ARM64">
+      <Configuration>PGInstrument</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
     <ProjectConfiguration Include="PGInstrument|Win32">
       <Configuration>PGInstrument</Configuration>
       <Platform>Win32</Platform>
@@ -29,6 +37,10 @@
       <Configuration>PGUpdate</Configuration>
       <Platform>ARM</Platform>
     </ProjectConfiguration>
+    <ProjectConfiguration Include="PGUpdate|ARM64">
+      <Configuration>PGUpdate</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
     <ProjectConfiguration Include="PGUpdate|Win32">
       <Configuration>PGUpdate</Configuration>
       <Platform>Win32</Platform>
@@ -41,6 +53,10 @@
       <Configuration>Release</Configuration>
       <Platform>ARM</Platform>
     </ProjectConfiguration>
+    <ProjectConfiguration Include="Release|ARM64">
+      <Configuration>Release</Configuration>
+      <Platform>ARM64</Platform>
+    </ProjectConfiguration>
     <ProjectConfiguration Include="Release|Win32">
       <Configuration>Release</Configuration>
       <Platform>Win32</Platform>