trasher: Include all the necessary headers

The missing headers are required for errno and for strerror.
This fixes building of this tool on mingw32ce.
Signed-off-by: Martin Storsjö <martin@martin.st>

tools/trasher.c

@@ -21,6 +21,8 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <inttypes.h>
+#include <errno.h>
+#include <string.h>
 
 static uint32_t state;
 static uint32_t ran(void)