binutils: remove unnecessary host-texinfo dependency

host-texinfo dependency was only necessary when building the git version
of binutils, however, this upstream commit allows binutils to build
without makeinfo (a binary provided by host-texinfo)...

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=bba33ab1e0f7d2ebd8f8435f92ed12e2a3c558a4



...so we can safely remove the host-texinfo dependency.

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>