Silicon/Intel/Tools: Update the minor version of FitGen tool.

This patch updates the minor version to 61 for the changes introduced
by commit 98c1cc2c.

Cc: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Siyuan Fu <siyuan.fu@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>