LD_LIBRARY_PATH fix for tools - Considering tools_root: Put tools library directories to LD_LIBRARY_PATH if the "ld.so trick" can not be used to start programs from tools_root - This fixes a bug introduced by my previous commit ("Cleanup: Removed unnecessary environment variables"): A side-effect of SBOX_REDIR_LD_* variables (which were removed) was that LD_LIBRARY_PATH contained also components that pointed to tools_root. However, having such components always there is not the optimal solution either.
LD_LIBRARY_PATH fix for tools - Considering tools_root: Put tools library directories to LD_LIBRARY_PATH if the "ld.so trick" can not be used to start programs from tools_root - This fixes a bug introduced by my previous commit ("Cleanup: Removed unnecessary environment variables"): A side-effect of SBOX_REDIR_LD_* variables (which were removed) was that LD_LIBRARY_PATH contained also components that pointed to tools_root. However, having such components always there is not the optimal solution either.

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