Temporarily disable gdb tests
Temporarily disable gdb tests

BUG= https://code.google.com/p/naclports/issues/detail?id=187
TBR=bradnelson

Review URL: https://codereview.chromium.org/854363002

Schibum/naclports,yeyus/naclports,yeyus/naclports,Schibum/naclports,Schibum/naclports,Schibum/naclports,yeyus/naclports,yeyus/naclports,Schibum/naclports,yeyus/naclports,yeyus/naclports,Schibum/naclports