GBE: clear deadprintfs when current function is done.
GBE: clear deadprintfs when current function is done.

It should be cleared, to prevent invalid pointers staying there
when processing next Function.

Signed-off-by: Ruiling Song <286a174c1339c6eff91abc41c3a1012c95030c95@intel.com>
Reviewed-by: He Junyan <8f73a735c668918c9613b750d3a88ebf2489599f@inbox.com>

zhenyw/beignet,freedesktop-unofficial-mirror/beignet,wdv4758h/beignet,wdv4758h/beignet,wdv4758h/beignet,wdv4758h/beignet,wdv4758h/beignet,zhenyw/beignet,zhenyw/beignet,freedesktop-unofficial-mirror/beignet,zhenyw/beignet,freedesktop-unofficial-mirror/beignet,zhenyw/beignet,freedesktop-unofficial-mirror/beignet