make add-on fails due to missing ./scripts/fixup.py

Following the directions in README to build cortex-strings as a glibc addon, I issued ./configure followed by make add-on:

[...]
rm -rf add-on-dist
mkdir -p add-on-dist/cortex-strings/sysdeps/arm/eabi/arm/cortex-a8
cp -f ./src/thumb-2/strcmp.c ./src/thumb-2/strcpy.c ./src/thumb-2/strlen.c ./src/neon/memcpy.S ./src/neon/memset.S add-on-dist/cortex-strings/sysdeps/arm/eabi/arm/cortex-a8
python ./scripts/fixup.py GLIBC add-on-dist/cortex-strings/sysdeps/arm/eabi/arm/cortex-a8/*
python: can't open file './scripts/fixup.py': [Errno 2] No such file or directory
make: *** [add-on] Error 2

There is no scripts/ directory at all in the released cortex-strings-0.1.1.

Davide