BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2166
file_lock and cache_lock are used as global data,
so move file_lock and cache_lock initialization in Build
object __init__ function.
Cc: Liming Gao <liming.gao@intel.com>
Cc: Steven Shi <steven.shi@intel.com>
Signed-off-by: Bob Feng <bob.c.feng@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
53e2eaba7a