fix examples with amalgamation

examples/example2.c

@@ -13,7 +13,7 @@
 #endif
 
 #include <stdio.h>
-#include "miniz_zip.h"
+#include "miniz.h"
 
 typedef unsigned char uint8;
 typedef unsigned short uint16;

examples/example4.c

@@ -1,6 +1,6 @@
 // example4.c - Uses tinfl.c to decompress a zlib stream in memory to an output file
 // Public domain, May 15 2011, Rich Geldreich, richgel99@gmail.com. See "unlicense" statement at the end of tinfl.c.
-#include "miniz_tinfl.h"
+#include "miniz.h"
 #include <stdio.h>
 #include <limits.h>