linux: properly delete __pycache__ directories

We were feeding in the wrong source path, resulting in a no-op.

This change reduces the size of the raw tar file from ~26MB to ~19MB.

Author: indygreg

cpython-linux/build-cpython.sh

@@ -70,7 +70,7 @@ make -j `nproc` install DESTDIR=/build/out/python
 
 # Downstream consumers don't require bytecode files. So remove them.
 # Ideally we'd adjust the build system. But meh.
-find ${ROOT}/out/python/install -type d -name __pycache__ -print0 | xargs -0 rm -rf
+find /build/out/python/install -type d -name __pycache__ -print0 | xargs -0 rm -rf
 
 # Also copy object files so they can be linked in a custom manner by
 # downstream consumers.