unicode: s/FEATURE_ASSUME_UNICODE/UNICODE_SUPPORT, add UNICODE_USING_LOCALE

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

scripts/defconfig

@@ -24,7 +24,7 @@ CONFIG_FEATURE_VERBOSE_USAGE=y
 CONFIG_FEATURE_COMPRESS_USAGE=y
 CONFIG_FEATURE_INSTALLER=y
 CONFIG_LOCALE_SUPPORT=y
-CONFIG_FEATURE_ASSUME_UNICODE=y
+CONFIG_UNICODE_SUPPORT=y
 # CONFIG_FEATURE_CHECK_UNICODE_IN_ENV is not set
 CONFIG_LONG_OPTS=y
 CONFIG_FEATURE_DEVPTS=y

scripts/randomtest

@@ -50,7 +50,7 @@ cat .config \
 | grep -v ^CONFIG_BUILD_LIBBUSYBOX= \
 | grep -v ^CONFIG_PAM= \
 | grep -v ^CONFIG_TASKSET= \
-| grep -v ^CONFIG_FEATURE_ASSUME_UNICODE= \
+| grep -v ^CONFIG_UNICODE_SUPPORT= \
 | grep -v ^CONFIG_PIE= \
 | grep -v CONFIG_STATIC \
 | grep -v CONFIG_CROSS_COMPILER_PREFIX \