Don't merge constants for yosys for the yosys conda package.
Don't merge constants for yosys for the yosys conda package.

This is because some strings that get binary patched by the conda
installer might overlap with some internal strings used by yosys.

Without disabling merge-constants, the yosys share search path was
changing from "<binary path>/../share/yosys/" to "<binary path>/../share/" as
a result from conda stirng patching.

Signed-off-by: Keith Rothman <1bc19627a439baf17510dc2d0b2d250c96d445a5@users.noreply.github.com>

SymbiFlow/conda-packages,SymbiFlow/conda-packages