Bring back the azl 4 gcc symlink

Author: am11

src/azurelinux/4.0/net11.0/crossdeps/amd64/Dockerfile

@@ -40,6 +40,12 @@ RUN dnf update -y && \
         azure-cli \
     && dnf clean all
 
+# GNU toolchain is installed in 'x86_64-azurelinux-linux' directory which is not recognized by
+# clang (https://github.com/llvm/llvm-project/blob/main/clang/lib/Driver/ToolChains/Gnu.cpp),
+# so we create a symlink with -pc- triplet.
+RUN ln -s /usr/lib/gcc/$(uname -m)-azurelinux-linux /usr/lib/gcc/$(uname -m)-pc-linux-gnu && \
+    ln -s /usr/include/c++/15/$(uname -m)-azurelinux-linux /usr/include/c++/15/$(uname -m)-pc-linux-gnu;
+
 COPY --from=powershell /usr/share/dotnet/LICENSE.txt /usr/share/dotnet/ThirdPartyNotices.txt /usr/share/dotnet/dotnet /usr/share/dotnet/
 COPY --from=powershell /usr/share/dotnet/host /usr/share/dotnet/host
 COPY --from=powershell /usr/share/dotnet/shared /usr/share/dotnet/shared