fix shell scripts to make unit tests

opy/build.sh

@@ -129,8 +129,8 @@ oil-repo() {
  local repo_root=$(cd $THIS_DIR/.. && pwd)
  local files=( $(oil-python-sources $repo_root) )  # array

  _compile-tree $src _tmp/oil-ccompile/ ccompile "${files[@]}"
  _compile-tree $src _tmp/oil-opy/ opy "${files[@]}"
  _compile-tree $repo_root _tmp/oil-ccompile/ ccompile "${files[@]}"
  _compile-tree $repo_root _tmp/oil-opy/ opy "${files[@]}"

  _fill-oil-tree _tmp/oil-ccompile/ 
  _fill-oil-tree _tmp/oil-opy/

opy/common.sh

@@ -64,6 +64,7 @@ oil-python-sources() {
    -name _tmp -a -prune -o \
    -name _chroot -a -prune -o \
    -name _deps -a -prune -o \
    -name _regtest -a -prune -o \
    -name cpython-full -a -prune -o \
    -name Python-2.7.13 -a -prune -o \
    -name '*.py' -a -printf "$fmt"