opendingux: uClibc: Enable fenv in config

Some programs (mupen64+) require that.
oprofile: Revert to version 0.9.8

This is the version supported by upstream Buildroot.
opendingux: GCW0: defconfig: Install binutils on the target

Having "objdump" on the root filesystem makes it easier to profile
the system and the kernel with oprofile.
opendingux: Hardcode default values in wlan scripts

This is done to simplify the configuration files.