Add DllCharacteristics.ForceIntegrity and ControlFlowGuard. (#78072)

* Add `DllCharacteristics.ForceIntegrity` and `ControlFlowGuard`.

* Update src/libraries/System.Reflection.Metadata/src/System/Reflection/PortableExecutable/PEFileFlags.cs

Co-authored-by: Stephen Toub <[email protected]>

Co-authored-by: Stephen Toub <[email protected]>

Author: teo-tsirpanis

src/libraries/System.Reflection.Metadata/ref/System.Reflection.Metadata.cs

@@ -3248,12 +3248,14 @@ public enum DllCharacteristics : ushort
         ThreadTerm = (ushort)8,
         HighEntropyVirtualAddressSpace = (ushort)32,
         DynamicBase = (ushort)64,
+        ForceIntegrity = (ushort)128,
         NxCompatible = (ushort)256,
         NoIsolation = (ushort)512,
         NoSeh = (ushort)1024,
         NoBind = (ushort)2048,
         AppContainer = (ushort)4096,
         WdmDriver = (ushort)8192,
+        ControlFlowGuard = (ushort)16384,
         TerminalServerAware = (ushort)32768,
     }
     public enum Machine : ushort

src/libraries/System.Reflection.Metadata/src/System/Reflection/PortableExecutable/PEFileFlags.cs

@@ -80,6 +80,11 @@ public enum DllCharacteristics : ushort
         /// </summary>
         DynamicBase = 0x0040,
 
+        /// <summary>
+        /// Code integrity checks are enforced.
+        /// </summary>
+        ForceIntegrity = 0x0080,
+
         /// <summary>
         /// Image is NX compatible.
         /// </summary>
@@ -110,6 +115,14 @@ public enum DllCharacteristics : ushort
         /// </summary>
         WdmDriver = 0x2000,
 
+        /// <summary>
+        /// The image supports Control Flow Guard.
+        /// </summary>
+        ControlFlowGuard = 0x4000,
+
+        /// <summary>
+        /// The image is Terminal Server aware.
+        /// </summary>
         TerminalServerAware = 0x8000,
     }