[Sema] Make helper in TreeTransform.h 'inline' instead of 'static'. NFC

[ilya-biryukov]

Summary

There seems to be no evidence that having internal linkage for the function
was intentional. Since 'static' functions are normally used only in .cpp
files, using 'inline' in the header file is more appropriate.

[merge_guards_bot]

Build result: fail - 33519 tests passed, 1 failed and 464 were skipped.

failed: LLVM.tools/llvm-ar/mri-utf8.test

Log files: cmake-log.txt, ninja_check_all-log.txt, CMakeCache.txt

[Anastasia]

I agree. LGTM! Thanks!

clang/lib/Sema/TreeTransform.h

if (getDerived().AlwaysRebuild() ||
     Result = SemaRef.Context.getDecayedType(OriginalType);
   TLB.push<DecayedTypeLoc>(Result);
   // Nothing to set for DecayedTypeLoc.
   return Result;
 }
 
 /// Helper to deduce addr space of a pointee type in OpenCL mode.
 /// If the type is updated it will be overwritten in PointeeType param.
-static void deduceOpenCLPointeeAddrSpace(Sema &SemaRef, QualType &PointeeType) {
+inline void deduceOpenCLPointeeAddrSpace(Sema &SemaRef, QualType &PointeeType) {
   if (PointeeType.getAddressSpace() == LangAS::Default)
     PointeeType = SemaRef.Context.getAddrSpaceQualType(PointeeType,
                                                        LangAS::opencl_generic);
 }
 
 template<typename Derived>
 QualType TreeTransform<Derived>::TransformPointerType(TypeLocBuilder &TLB,
                                                       PointerTypeLoc TL) {