/usr/lib/llvm-3.5/include/clang/Sema/ is in libclang-3.5-dev 1:3.5-4ubuntu2~trusty2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/llvm-3.5/include/clang/Sema/AnalysisBasedWarnings.h
/usr/lib/llvm-3.5/include/clang/Sema/AttrParsedAttrImpl.inc
/usr/lib/llvm-3.5/include/clang/Sema/AttrParsedAttrKinds.inc
/usr/lib/llvm-3.5/include/clang/Sema/AttrParsedAttrList.inc
/usr/lib/llvm-3.5/include/clang/Sema/AttrSpellingListIndex.inc
/usr/lib/llvm-3.5/include/clang/Sema/AttrTemplateInstantiate.inc
/usr/lib/llvm-3.5/include/clang/Sema/AttributeList.h
/usr/lib/llvm-3.5/include/clang/Sema/CXXFieldCollector.h
/usr/lib/llvm-3.5/include/clang/Sema/CodeCompleteConsumer.h
/usr/lib/llvm-3.5/include/clang/Sema/CodeCompleteOptions.h
/usr/lib/llvm-3.5/include/clang/Sema/DeclSpec.h
/usr/lib/llvm-3.5/include/clang/Sema/DelayedDiagnostic.h
/usr/lib/llvm-3.5/include/clang/Sema/Designator.h
/usr/lib/llvm-3.5/include/clang/Sema/ExternalSemaSource.h
/usr/lib/llvm-3.5/include/clang/Sema/IdentifierResolver.h
/usr/lib/llvm-3.5/include/clang/Sema/Initialization.h
/usr/lib/llvm-3.5/include/clang/Sema/LocInfoType.h
/usr/lib/llvm-3.5/include/clang/Sema/Lookup.h
/usr/lib/llvm-3.5/include/clang/Sema/LoopHint.h
/usr/lib/llvm-3.5/include/clang/Sema/MultiplexExternalSemaSource.h
/usr/lib/llvm-3.5/include/clang/Sema/ObjCMethodList.h
/usr/lib/llvm-3.5/include/clang/Sema/Overload.h
/usr/lib/llvm-3.5/include/clang/Sema/Ownership.h
/usr/lib/llvm-3.5/include/clang/Sema/ParsedTemplate.h
/usr/lib/llvm-3.5/include/clang/Sema/PrettyDeclStackTrace.h
/usr/lib/llvm-3.5/include/clang/Sema/Scope.h
/usr/lib/llvm-3.5/include/clang/Sema/ScopeInfo.h
/usr/lib/llvm-3.5/include/clang/Sema/Sema.h
/usr/lib/llvm-3.5/include/clang/Sema/SemaConsumer.h
/usr/lib/llvm-3.5/include/clang/Sema/SemaDiagnostic.h
/usr/lib/llvm-3.5/include/clang/Sema/SemaFixItUtils.h
/usr/lib/llvm-3.5/include/clang/Sema/SemaInternal.h
/usr/lib/llvm-3.5/include/clang/Sema/SemaLambda.h
/usr/lib/llvm-3.5/include/clang/Sema/Template.h
/usr/lib/llvm-3.5/include/clang/Sema/TemplateDeduction.h
/usr/lib/llvm-3.5/include/clang/Sema/TypoCorrection.h
/usr/lib/llvm-3.5/include/clang/Sema/Weak.h