tests: link them dynamically by default

. so that functionality is tested
	. add test63 that actually tests dlopen(), dlsym(),
	  etc. functionality; only built if clang supports it
	. also test10 test to copy more of the executable

test/magic.h

@@ -0,0 +1,9 @@
+
+#define MAGIC1 0x12C0ED
+#define MAGIC2 0x12C0FF
+#define MAGIC3 0x12D0FF
+#define MAGIC4 0x13D0FE
+#define MAGIC5 0x14D1FF
+#define MAGIC6 0x17D1FF
+
+long hellodriver(void);