Since commit 922b82bde9 ("libsigrok:
bump version to 0.5.1"), libsigrok depends on BR2_ENABLE_LOCALE, but
this dependency was not propagated to sigrok-cli. This commit fixes
this issue.
Reported-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>