[lldb] Fix TestModuleGetXcodeSDK test after DWARFYAML change

D82622 / fe08ab5 changes the YAML format
so this test was failing as the test yaml wasn't updated.

Author: Teemperor

lldb/unittests/SymbolFile/DWARF/XcodeSDKModuleTests.cpp

@@ -47,8 +47,7 @@ TEST_F(XcodeSDKModuleTests, TestModuleGetXcodeSDK) {
       - Attribute:       DW_AT_APPLE_sdk
         Form:            DW_FORM_strp
 debug_info:
-  - Length:
-      TotalLength:     8
+  - Length:          8
     Version:         2
     AbbrOffset:      0
     AddrSize:        8