Workaround missing arc4random symbol on Linux

Author: natecook1000

Sources/BinaryParsing/Support/LinuxRNGSupport.swift

@@ -0,0 +1,15 @@
+//===----------------------------------------------------------------------===//
+//
+// This source file is part of the Swift Binary Parsing open source project
+//
+// Copyright (c) 2025 Apple Inc. and the Swift project authors
+// Licensed under Apache License v2.0 with Runtime Library Exception
+//
+// See https://swift.org/LICENSE.txt for license information
+//
+//===----------------------------------------------------------------------===//
+
+#if $Embedded && os(Linux)
+// Temporary workaround for lack of random support on embedded Linux
+@c func arc4random_buf(_ buf: UnsafeMutableRawPointer?, _ nbytes: Int) {}
+#endif