litex/MANIFEST.in

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graft litex/soc/software
graft litex/soc/cores/cpu/blackparrot
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graft litex/soc/cores/cpu/microwatt
graft litex/soc/cores/cpu/minerva
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graft litex/soc/cores/cpu/picorv32
graft litex/soc/cores/cpu/rocket
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graft litex/soc/cores/cpu/vexriscv
graft litex/soc/cores/cpu/vexriscv_smp
graft litex/soc/cores/cpu/zynq7000