scripts/get_default_envs.sh: Remove blank lines

After sorting, unnoticed blank lines at the end move to the top.
Avoid this by removing it before sorting.

Signed-off-by: Christoph Niedermaier <cniedermaier@dh-electronics.com>
Cc: Lukasz Majewski <lukma@denx.de>
Cc: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Cc: Tom Rini <trini@konsulko.com>
To: u-boot@lists.denx.de
1 file changed