This relands the commit previously reverted in `8570bee53a8ce0c5d04bc11f288e19a457474c4c` due to failures on linux. The problem was that the test executable was built with absolute OSO prefix paths. This re-commit adds a modified version of the executable that strips the absolute OSO prefix paths and makes sure the test appends the OSO prefix appropriately (via the appropriate dsymutil flags). Differential Revision: https://reviews.llvm.org/D143458
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