avr-binutils: really cleanup template

- --host and --build should be set by
  common/environment/configure/gnu-configure-args.sh
- The current setting is broken from b7840fa4ce. No need to rev-bump
  because the original template is correct.
- It's --enable-install-libbfd  not --enable-install-libbbfd

srcpkgs/avr-binutils/template

@@ -5,8 +5,7 @@ revision=1
 wrksrc="binutils-$version"
 build_style=gnu-configure
 configure_args="--disable-werror --enable-shared --enable-gold
- --enable-plugins --enable-install-libbbfd --build=${XBPS_TRIPLET}
+ --enable-plugins --enable-install-libbfd --target=avr --with-pic"
- --host=${XBPX_CROSS_TRIPLET} --target=avr --with-pic"
 make_install_args="tooldir=/usr"
 makedepends="zlib-devel"
 short_desc="GNU binary utilities for AVR"