Need set fileStatBuffer in handleNewlibSemihostStatRequest
Need set fileStatBuffer in handleNewlibSemihostStatRequest

Signed-off-by: Xiang Xiao <e94589cd03b1b3246d4b01f43c18f48c33b5de3a@xiaomi.com>
Change-Id: I4fea9a456851daaf386acffe3b63d40665bf2791

adamgreen/mri,adamgreen/mri,adamgreen/mri