libsframe: Fix calloc argument order in dump_sframe_header

libsframe: Fix calloc argument order in dump_sframe_header

GCC14 warns about the order of the arguments to calloc

libsframe/sframe-dump.c: In function ‘dump_sframe_header’:
libsframe/sframe-dump.c:70:39: warning: ‘calloc’ sizes specified with ‘sizeof’ in the earlier argument and not in the later argument [-Wcalloc-transposed-args]
   70 |   flags_str = (char*) calloc (sizeof (char), SFRAME_HEADER_FLAGS_STR_MAX_LEN);
      |                                       ^~~~
libsframe/sframe-dump.c:70:39: note: earlier argument should specify number of elements, later size of each element

Fix this by swapping the size and count arguments.

libsframe/

	* sframe-dump.c (dump_sframe_header): Swap arguments to calloc