restore FILESPATH to previous setting because the new one doesn't allow the
normal use of FILESEXTRAPATHS_prepend in the case of append recipe.
In the current implementation, in fact, the FILESPATH is statically set into
the gcc-4.7.inc and so the base_set_filespath is not invoked to manage
extrapaths.
Signed-off-by: Giuseppe Condorelli <giuseppe.condorelli@st.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
