examples/testcase: Fix wrong typo in tc main
Fixes wrong typo "#if CONFIG_TASH" introduced in the commit
Due to which error occurs in tc_main when CONFIG_TASH is disabled.
The correct typo is "#ifdef CONFIG_TASH".
#include <semaphore.h>
#include "tc_common.h"
-#if CONFIG_TASH
+#ifdef CONFIG_TASH
#include <apps/shell/tash.h>
#else
#if defined(CONFIG_EXAMPLES_TESTCASE_ARASTORAGE_UTC) || defined(CONFIG_EXAMPLES_TESTCASE_ARASTORAGE_ITC)
