add error when attribute is found outside section
add error when attribute is found outside section

nandub/pkgbuild-introspection,falconindy/pkgbuild-introspection,nandub/pkgbuild-introspection,mikkeloscar/pkgbuild-introspection,falconindy/pkgbuild-introspection,mikkeloscar/pkgbuild-introspection