Add better FV patch detection

Resources/Build.py

@@ -710,6 +710,8 @@ class BuildOpenCore:
             # Note this function was added in 11.3 (20E232, 20.4), older builds do not support this (ie. 11.2.3)
             print("- Allowing FileVault on Root Patched systems")
             self.get_item_by_kv(self.config["Kernel"]["Patch"], "Identifier", "com.apple.filesystems.apfs")["Enabled"] = True
+            # Lets us check in SysPatch.py if config supports FileVault
+            self.config["NVRAM"]["Add"]["4D1FDA02-38C7-4A6A-9CC6-4BCCA8B30102"]["OCLP-Settings"] += "-allow_fv"
 
     def set_smbios(self):
         spoofed_model = self.model