Add test programs to github.

tests/helloebcdic/helloebcdic.cpp

@@ -0,0 +1,13 @@
+#include <string.h>
+#include <stdio.h>
+#include <malloc.h>
+
+int main (void) {
+
+    // Should show up as "Hello there!" in Seer Memory Visualizer in ebcdic mode.
+
+    static char str[] = "\xc8\x85\x93\x93\x96\x40\xa3\x88\x85\x99\x85\x5a";
+
+    return 0;
+}
+