[BOLT][DWARF] Re-enable DWARF5 tests.

[ayermolo]

Summary

Test Plan:

cross-project-tests/lit.cfg.py

 
 # clang_src_dir and lld_src_dir are not used by these tests, but are required by
 # use_clang() and use_lld() respectively, so set them to "", if needed.
 if not hasattr(config, 'clang_src_dir'):
     config.clang_src_dir = ""
 # Facebook T92898286
 should_test_bolt = get_required_attr(config, "llvm_test_bolt")
 if should_test_bolt:
-    llvm_config.use_clang(required=('clang' in config.llvm_enabled_projects), additional_flags=['--post-link-optimize', '-fdebug-default-version=4'])
+    llvm_config.use_clang(required=('clang' in config.llvm_enabled_projects), additional_flags=['--post-link-optimize'])
 else:
     llvm_config.use_clang(required=('clang' in config.llvm_enabled_projects))
 # End Facebook T92898286
 
 if not hasattr(config, 'lld_src_dir'):
     config.lld_src_dir = ""
 llvm_config.use_lld(required=('lld' in config.llvm_enabled_projects))
 

lldb/test/API/lit.cfg.py

 if is_configured('lldb_libs_dir'):
   dotest_cmd += ['--lldb-libs-dir', config.lldb_libs_dir]
 
 if is_configured('lldb_framework_dir'):
   dotest_cmd += ['--framework', config.lldb_framework_dir]
 
 # Facebook T92898286
 if is_configured("llvm_test_bolt"):
-    dotest_cmd += ['-E', '"--post-link-optimize"',
-                   '-E', '"-fdebug-default-version=4"']
+    dotest_cmd += ['-E', '"--post-link-optimize"']
 # End Facebook T92898286
 
 if 'lldb-repro-capture' in config.available_features or \
     'lldb-repro-replay' in config.available_features:
   dotest_cmd += ['--skip-category=lldb-vscode', '--skip-category=std-module']
 
 if 'lldb-simulator-ios' in config.available_features:
   dotest_cmd += ['--apple-sdk', 'iphonesimulator',

lldb/test/Shell/helper/toolchain.py

if sys.platform.startswith('netbsd'):
         host_flags += ['-L' + config.llvm_libs_dir,
                   '-Wl,-rpath,' + config.llvm_libs_dir]
 
     # The clang module cache is used for building inferiors.
     host_flags += ['-fmodules-cache-path={}'.format(config.clang_module_cache)]
 
     # Facebook T92898286
     if config.llvm_test_bolt:
-        host_flags += ['--post-link-optimize', '-fdebug-default-version=4']
+        host_flags += ['--post-link-optimize']
     # End Facebook T92898286
 
     host_flags = ' '.join(host_flags)
     config.substitutions.append(('%clang_host', '%clang ' + host_flags))
     config.substitutions.append(('%clangxx_host', '%clangxx ' + host_flags))
     config.substitutions.append(('%clang_cl_host', '%clang_cl --target='+config.host_triple))
 
     additional_tool_dirs=[]