Tests: temp fix for failing tests on newer gcc versions

This is a temporary fix for failing tests on newer gcc versions.
Note that older gcc versions doesnot support -fcf-protection
option, so this commit will cause failure on these versions.

Related issues:
#117
#181

Vasily Leonenko,
Advanced Software Technology Lab, Huawei

bolt/test/lit.cfg.py

@@ -44,8 +44,8 @@
 config.substitutions.append(('%host_cc', config.host_cc))
 config.substitutions.append(('%host_cxx', config.host_cxx))
 
-config.substitutions.append(('%cflags', '-no-pie'))
-config.substitutions.append(('%cxxflags', '-no-pie'))
+config.substitutions.append(('%cflags', '-no-pie -fcf-protection=none'))
+config.substitutions.append(('%cxxflags', '-no-pie -fcf-protection=none'))
 
 tool_dirs = [config.llvm_tools_dir,
              config.test_source_root]