File libcxx-test-library-path.patch of Package llvm19

--- a/libcxx/test/configs/llvm-libc++-shared.cfg.in
+++ b/libcxx/test/configs/llvm-libc++-shared.cfg.in
@@ -9,10 +9,10 @@ config.substitutions.append(('%{compile_flags}',
     '-nostdinc++ -I %{target-include-dir} -I %{include-dir} -I %{libcxx-dir}/test/support'
 ))
 config.substitutions.append(('%{link_flags}',
-    '-nostdlib++ -L %{lib-dir} -Wl,-rpath,%{lib-dir} -lc++'
+    '-nostdlib++ -L %{lib-dir} -lc++'
 ))
 config.substitutions.append(('%{exec}',
-    '%{executor} --execdir %T -- '
+    '%{executor} --execdir %T --env LD_LIBRARY_PATH=%{lib} -- '
 ))
 
 import os, site