Specify a correct MMAP2_PAGE_SHIFT to use when calculating the offset

for mmap2() on CRIS.

ldso/ldso/cris/dl-syscalls.h

@@ -4,3 +4,5 @@
 extern int _dl_errno;
 #undef __set_errno
 #define __set_errno(X) {(_dl_errno) = (X);}
+
+#define MMAP2_PAGE_SHIFT 13