[clang] [lld] [llvm] [llvm][lld][clang] Delay initializing TargetOptions in LTO builds until a Triple is available (PR #179509)

[Alexander Richardson via cfe-commits]

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@@ -43,50 +43,67 @@ static std::string getThinLTOOutputFile(Ctx &ctx, StringRef modulePath) {
                                    ctx.arg.thinLTOPrefixReplaceNew);
 }
 
+static std::shared_ptr<MemoryBuffer> getMemoryBuffer(Ctx &ctx) {
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arichardson wrote:

```suggestion
static std::shared_ptr<MemoryBuffer> getBBSectionsMemoryBuffer(Ctx &ctx) {
```
Maybe rename this?

https://github.com/llvm/llvm-project/pull/179509