[Buildroot] LIBFOO_SITE in .mk file

[Jeff Krasky]

> > I went to run 'make linux-menuconfig' and I got this message:
> > 
> > package/igh-ethercat/igh-ethercat.mk:11: *** missing separator.  Stop.
>
> I have tried running just 'make' and that gives the same error.

Looks like those lines had to be on the same line as the 'if' that proceeded
them:

IGH_ETHERCAT_CONF_OPT += $(if
$(BR2_PACKAGE_IGH_ETHERCAT_8139TOO),--enable-8139too,--disable-8139too)

all one line.

Also, the endef's appearing later on had to be placed on their own line, at
the beginning.