[Bug bootstrap/87858] Building old multilib bootstrap GCC: stage1 32-bit libstdc++ fails to build after building 64-bit libstdc++

[mkrupcale at matthewkrupcale dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87858

--- Comment #10 from Matthew Krupcale <mkrupcale at matthewkrupcale dot com> ---
Created attachment 55186
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55186&action=edit
GCC 7 post stage1 libstdc++ path export patch

This patch is for GCC 7 and exports the target libstdc++ path on
LD_LIBRARY_PATH only after stage1 for both host and target modules.