build: epiphany: Comment out e-hal+e-loader detection
build: epiphany: Comment out e-hal+e-loader detection

benchmarks+tests still depend on it but we shouldn't need it.

Signed-off-by: Ola Jeppsson <793f970c52ded1276b9264c742f19d1888cbaf73@adapteva.com>

aolofsson/pal,parallella/pal,aolofsson/pal,parallella/pal,parallella/pal,aolofsson/pal,parallella/pal,aolofsson/pal,parallella/pal