libpcre will build, if found, optional support for bzip2/zlib in
pcregrep and a readline frontend to pcretest. It will not however
listen to --disable-pcregrep-{libz,libbz2} and will still build
these if found. So we add bzip2, zlib and readline to DEPENDS to make
sure that we get consistent builds.
Signed-off-by: Tom Rini <tom_rini@mentor.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
