msi: Set the MsiAMD64 and Msix64 properties on 64-bit.

dlls/msi/package.c

@@ -684,6 +684,8 @@ static VOID set_installer_properties(MSIPACKAGE *package)
     static const WCHAR szColorBits[] = {'C','o','l','o','r','B','i','t','s',0};
     static const WCHAR szIntFormat[] = {'%','d',0};
     static const WCHAR szIntel[] = { 'I','n','t','e','l',0 };
+    static const WCHAR szMsiAMD64[] = { 'M','s','i','A','M','D','6','4',0 };
+    static const WCHAR szMsix64[] = { 'M','s','i','x','6','4',0 };
     static const WCHAR szUserInfo[] = {
         'S','O','F','T','W','A','R','E','\\',
         'M','i','c','r','o','s','o','f','t','\\',
@@ -845,6 +847,12 @@ static VOID set_installer_properties(MSIPACKAGE *package)
         sprintfW( bufstr, szIntFormat, sys_info.wProcessorLevel );
         msi_set_property( package->db, szIntel, bufstr );
     }
+    else if (sys_info.u.s.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
+    {
+        sprintfW( bufstr, szIntFormat, sys_info.wProcessorLevel );
+        msi_set_property( package->db, szMsiAMD64, bufstr );
+        msi_set_property( package->db, szMsix64, bufstr );
+    }
 
     /* Screen properties. */
     dc = GetDC(0);