Reproducible builds: fixed clang version display

scripts/release/images/ubuntu/Dockerfile

@@ -1,3 +1,3 @@
 FROM ubuntu:24.04
-ADD prepare.sh /
+ADD prepare.sh clang_version.patch /
 RUN /prepare.sh

scripts/release/images/ubuntu/clang_version.patch

@@ -0,0 +1,15 @@
+diff --git a/clang/lib/Frontend/InitPreprocessor.cpp b/clang/lib/Frontend/InitPreprocessor.cpp
+index cce839295..b87fe998e 100644
+--- a/clang/lib/Frontend/InitPreprocessor.cpp
++++ b/clang/lib/Frontend/InitPreprocessor.cpp
+@@ -873,9 +873,7 @@ static void InitializePredefinedMacros(const TargetInfo &TI,
+   Builder.defineMacro("__clang_patchlevel__", TOSTR(CLANG_VERSION_PATCHLEVEL));
+ #undef TOSTR
+ #undef TOSTR2
+-  Builder.defineMacro("__clang_version__",
+-                      "\"" CLANG_VERSION_STRING " "
+-                      + getClangFullRepositoryVersion() + "\"");
++  Builder.defineMacro("__clang_version__", "\"" CLANG_VERSION_STRING "\"");
+ 
+   if (LangOpts.GNUCVersion != 0) {
+     // Major, minor, patch, are given two decimal places each, so 4.2.1 becomes

scripts/release/images/ubuntu/prepare.sh

@@ -145,6 +145,9 @@ cd /root
 git clone --depth 1 --branch llvmorg-$CLANG_VERSION https://github.com/llvm/llvm-project.git
 
 cd llvm-project
+mv /clang_version.patch .
+git apply --verbose --ignore-whitespace clang_version.patch
+
 mkdir build && cd build
 cmake -G Ninja -DCMAKE_C_COMPILER=gcc -DCMAKE_CXX_COMPILER=g++ -DLLVM_ENABLE_PROJECTS="clang;lld;libc" -DCMAKE_BUILD_TYPE=Release -DLLVM_VERSION_SUFFIX="_p2pool" -DLIBC_WNO_ERROR=ON -DLLVM_APPEND_VC_REV=OFF ../llvm
 ninja