Revert "swr/rast: Archrast codegen updates"

Revert "swr/rast: Archrast codegen updates"

This reverts the following commits:
71a76a47ccb34c5c259781ed49b0013e86dfaa31 "swr/codegen: fix autotools build"
7763e664cefd1e394101b37fbc552b50f820f44a "meson/swr: replace hard-coded path with current_build_dir()"
773b3ceacaf6d32135348e07878b8514a4350b0e "swr/rast: Fix autotools and scons codegen"
16e10b8c304481e423e76311f70de5de9e7424b1 "swr/rast: Add general SWTag statistics"
b45a15a39f7630d569fcf1296dac1415eb758249 "swr/rast: Add string handling to AR event framework"
8608a747aafe6aef42fba148bfcdbb3ca136e7de "swr/rast: Add initial SWTag proto definitions"
93cd9905c8fbb98985ae1a61c0eebdb225fd1325 "swr/rast: Cleanup and generalize gen_archrast"

The last one in this list broke all the build systems that can build
this (meson, autotools & scons).

See MR !304 for more details:
https://gitlab.freedesktop.org/mesa/mesa/merge_requests/304

Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>