[rootx] Fake correct "LD_LIBRARY_PATH" for install builds:
[rootx] Fake correct "LD_LIBRARY_PATH" for install builds:

also if configured with CMAKE_INSTALL_PREFIX, root.exe relies on LD_LIBRARY_PATH to find libRint etc (unless configured with RPATH).
This fixed root.exe not finding libRint from the install dir.

karies/root,root-mirror/root,karies/root,root-mirror/root,karies/root,karies/root,root-mirror/root,olifre/root,root-mirror/root,olifre/root,karies/root,root-mirror/root,olifre/root,olifre/root,karies/root,karies/root,root-mirror/root,olifre/root,karies/root,olifre/root,root-mirror/root,olifre/root,olifre/root,root-mirror/root,karies/root,root-mirror/root,olifre/root,karies/root,root-mirror/root,karies/root,root-mirror/root,olifre/root,olifre/root