[clang] Remove Linux search paths on Windows (PR #113628)

[Joseph Huber via cfe-commits]

================
@@ -6440,7 +6440,8 @@ const ToolChain &Driver::getToolChain(const ArgList &Args,
       TC = std::make_unique<toolchains::NVPTXToolChain>(*this, Target, Args);
       break;
     case llvm::Triple::AMDHSA:
-      TC = std::make_unique<toolchains::ROCMToolChain>(*this, Target, Args);
+      TC = std::make_unique<toolchains::ROCMToolChain>(*this, Target, Args,
+                                                       Target.isOSWindows());
----------------
jhuber6 wrote:

Do we actually require the ROCm installation from the device's TC? I guess it'd be used when making the device interface? The `HIPAMDToolChain` has a reference to the host toolchain, so I'd argue that we should use that one's ROCm installation and never use the device one.

https://github.com/llvm/llvm-project/pull/113628