unicode: kunit: change tests filename and path

Change utf8 kunit test filename and path to follow the style
convention on Documentation/dev-tools/kunit/style.rst

Co-developed-by: Pedro Orlando <[e-mail]>
Signed-off-by: Pedro Orlando <[e-mail]>
Co-developed-by: Danilo Pereira <[e-mail]>
Signed-off-by: Danilo Pereira <[e-mail]>
Signed-off-by: Gabriela Bittencourt <[e-mail]>
Reviewed-by: David Gow <[e-mail]>
Acked-by: Gabriel Krisman Bertazi <[e-mail]>
Reviewed-by: Shuah Khan <[e-mail]>
Reviewed-by: Rae Moar <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Kees Cook <[e-mail]>

fs/unicode/Makefile

···
 obj-y			+= unicode.o
 endif
 obj-$(CONFIG_UNICODE)	+= utf8data.o
-obj-$(CONFIG_UNICODE_NORMALIZATION_KUNIT_TEST) += utf8-selftest.o
+obj-$(CONFIG_UNICODE_NORMALIZATION_KUNIT_TEST) += tests/utf8_kunit.o
 
 unicode-y := utf8-norm.o utf8-core.o
 

fs/unicode/utf8-selftest.c fs/unicode/tests/utf8_kunit.c

···
 #include <linux/unicode.h>
 #include <kunit/test.h>
 
-#include "utf8n.h"
+#include "../utf8n.h"
 
 static const struct {
 	/* UTF-8 strings in this vector _must_ be NULL-terminated. */