BaseTools: Check the fread function and avoid dead loop

BaseTools: Check the fread function and avoid dead loop

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=1789

If the input file is not a valid file, it may cause dead loop,
because the return of fread function is not checked.

Signed-off-by: Zhiguang Liu <zhiguang.liu@intel.com>
Cc: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Reviewed-by: Bob Feng <bob.c.feng@intel.com>