Update examples

testsuite/eval/foreign_eval1/Makefile

@@ -0,0 +1,2 @@
+TOP=../../..
+include ../../foreign.mk

testsuite/eval/foreign_eval1/expected

@@ -0,0 +1 @@
+10946

testsuite/eval/foreign_eval1/main.c

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+#include <stdio.h>
+
+#include "EvalHaskell.h"
+
+int main(int argc, char *argv[])
+{
+  char *p;
+  hs_init(&argc, &argv);
+  p = hs_eval_s("show $ let fibs = 1:1:zipWith (+) fibs (tail fibs) in fibs !! 20");
+  if (p == NULL)
+  	  printf("failed!\n");
+  else
+	  printf("%s\n",p);
+  hs_exit();
+  return 0;
+}