[clang] [clang][driver] Remove -v from mkdir & ln -s from a test since it fails on ppc64 (PR #72924)

[Liviu Ionescu via cfe-commits]

https://github.com/ilg-ul created https://github.com/llvm/llvm-project/pull/72924

The PR https://github.com/llvm/llvm-project/pull/70817 introduced a small bug, the tests failed on ppc64 with:

```
RUN: at line 186: mkdir -pv /home/powerllvm/powerllvm_env/aix-ppc64/clang-ppc64-aix/build/tools/clang/test/Driver/Output/darwin-header-search-libcxx.cpp.tmp/install/bin
+ mkdir -pv /home/powerllvm/powerllvm_env/aix-ppc64/clang-ppc64-aix/build/tools/clang/test/Driver/Output/darwin-header-search-libcxx.cpp.tmp/install/bin
mkdir: illegal option -- v
Usage: mkdir [-p] [-e] [-m mode] Directory ... 
```

This PR removes the verbose flag from both `mkdir` and `ln -s`.



>From bf70f0276bc7db350d0d1b0b5a97800cee2d8ac6 Mon Sep 17 00:00:00 2001
From: Liviu Ionescu <ilg at livius.net>
Date: Tue, 21 Nov 2023 01:24:49 +0200
Subject: [PATCH] Remove -v from mkdir & ln -s

---
 clang/test/Driver/darwin-header-search-libcxx.cpp | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/clang/test/Driver/darwin-header-search-libcxx.cpp b/clang/test/Driver/darwin-header-search-libcxx.cpp
index 8f530299d53c6d8..70cc06090a993d6 100644
--- a/clang/test/Driver/darwin-header-search-libcxx.cpp
+++ b/clang/test/Driver/darwin-header-search-libcxx.cpp
@@ -183,15 +183,15 @@
 // local folder hierarchy that meets this requirement.
 // Note: this might not work with weird RPATH configurations.
 // RUN: rm -rf %t/install
-// RUN: mkdir -pv %t/install/bin
+// RUN: mkdir -p %t/install/bin
 // RUN: cp %clang %t/install/bin/clang
-// RUN: mkdir -pv %t/install/include/c++/v1
+// RUN: mkdir -p %t/install/include/c++/v1
 
 // Headers in (1) and in (2) -> (1) is preferred over (2)
 // RUN: rm -rf %t/symlinked1
-// RUN: mkdir -pv %t/symlinked1/bin
-// RUN: ln -svf %t/install/bin/clang %t/symlinked1/bin/clang
-// RUN: mkdir -pv %t/symlinked1/include/c++/v1
+// RUN: mkdir -p %t/symlinked1/bin
+// RUN: ln -sf %t/install/bin/clang %t/symlinked1/bin/clang
+// RUN: mkdir -p %t/symlinked1/include/c++/v1
 
 // RUN: %t/symlinked1/bin/clang -### %s -fsyntax-only 2>&1 \
 // RUN:     --target=x86_64-apple-darwin \
@@ -207,8 +207,8 @@
 
 // Headers in (2) and in (3) -> (2) is preferred over (3)
 // RUN: rm -rf %t/symlinked2
-// RUN: mkdir -pv %t/symlinked2/bin
-// RUN: ln -svf %t/install/bin/clang %t/symlinked2/bin/clang
+// RUN: mkdir -p %t/symlinked2/bin
+// RUN: ln -sf %t/install/bin/clang %t/symlinked2/bin/clang
 
 // RUN: %t/symlinked2/bin/clang -### %s -fsyntax-only 2>&1 \
 // RUN:     --target=x86_64-apple-darwin \