GBE: fix a bug with LLVM 3.3.
GBE: fix a bug with LLVM 3.3.

Signed-off-by: Zhigang Gong <e04a7b9b70b1e4c6318cf117dcd1a9056e14b97a@intel.com>
Tested-by: Meng, Mengmeng <c9e0ecea92e14a35e72e26c7583f18422f51dcc3@intel.com>

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