swift

3504310f - [build] ensure benchmark toolchain tests use the just built libraries (#38158)

[build] ensure benchmark toolchain tests use the just built libraries (#38158) The binaries would prefer the dylibs shipped in the OS to the ones just built -- employ `DYLD_LIBRARY_PATH` to pick up the latter instead. The main purpose of this change is to unblock the generation of nightly toolchains. Addresses rdar://79788142