Remove _build/detected-config.h from the tarball.

If the user ran ./configure it wouldn't cause a problem, but it could
have if they didn't.

build/compile.sh

@@ -285,8 +285,19 @@ _headers() {

python-headers() {
  local c_module_srcs=$1
  # remove Python/.. -- it causes problems with tar.
  _headers $c_module_srcs | egrep --only-matching '[^ ]+\.h' \

  # 1. -MM outputs Makefile fragments, so egrep turns those into proper lines.
  #
  # 2. The user should generated detected-config.h, so remove it.
  #
  # 3. # gcc outputs paths like
  # Python-2.7.13/Python/../Objects/stringlib/stringdefs.h
  # but 'Python/..' causes problems for tar.
  #

  _headers $c_module_srcs \
    | egrep --only-matching '[^ ]+\.h' \
    | grep -v '_build/detected-config.h' \
    | sed 's|^Python/../||' \
    | sort | uniq | add-py27
}