Fix EmbeddedApp example

Author: kateinoigakukun

Examples/Embedded/Sources/EmbeddedApp/_thingsThatShouldNotBeNeeded.swift

@@ -17,9 +17,20 @@ func strlen(_ s: UnsafePointer<Int8>) -> Int {
     return p - s
 }
 
+enum LCG {
+    static var x: UInt8 = 0
+    static let a: UInt8 = 0x05
+    static let c: UInt8 = 0x0b
+
+    static func next() -> UInt8 {
+        x = a &* x &+ c
+        return x
+    }
+}
+
 @_cdecl("arc4random_buf")
 public func arc4random_buf(_ buffer: UnsafeMutableRawPointer, _ size: Int) {
     for i in 0..<size {
-        buffer.storeBytes(of: UInt8.random(in: 0...255), toByteOffset: i, as: UInt8.self)
+        buffer.storeBytes(of: LCG.next(), toByteOffset: i, as: UInt8.self)
     }
 }