kfdtest: Temporarily blacklist KFDNegativeTest

Blacklist KFDNegativeTest.BasicPipeReset from gfx950 until MEC can
support pipe reset on GC 9.5.0.

Signed-off-by: Amber Lin <Amber.Lin@amd.com>

libhsakmt/tests/kfdtest/scripts/kfdtest.exclude

@@ -364,6 +364,7 @@ FILTER[gfx950]=\
 "KFDMemoryTest.FlatScratchAccess:"\
 "KFDIPCTest.BasicTest:"\
 "KFDQMTest.QueueLatency:"\
+"KFDNegativeTest.BasicPipeReset:"\
 "KFDGWSTest.Semaphore"
 
 FILTER[gfx1200]=\