Add host_libdir to the LD_LIBRARY_PATH (#136)

* Add host_libdir to the LD_LIBRARY_PATH

This may be needed to run tools included in a HostBuildDependency,
as in Qt6.

* Update src/Runner.jl

Co-authored-by: Mosè Giordano <[email protected]>

Author: barche

src/Runner.jl

@@ -915,6 +915,8 @@ function platform_envs(platform::AbstractPlatform, src_name::AbstractString;
             "/lib64:/lib",
             # Add our CSL libraries for all architectures that can natively run within this environment
             csl_paths(host_platform),
+            # Libdir of the host platform, to run programs in `HostBuildDependency`
+            "$(host_libdir)",
             # Add our target/host-specific library directories for compiler support libraries
             target_lib_dir(host_platform),
             target_lib_dir(platform),