drivers/kernel_test: fix build error
this commit fix the build error of commit error is following
kernel_test/kernel_test_drv.c:30:10: fatal error: signal/signal.h: No such file or directory
30 | #include "signal/signal.h"
|          ^~~~~~~~~~~~~~~~~
compilation terminated
#
###########################################################################
+ifeq ($(CONFIG_DRIVERS_KERNEL_TEST),y)
include kernel_test$(DELIM)kernel$(DELIM)Make.defs
include kernel_test$(DELIM)network$(DELIM)Make.defs
-
CSRCS += kernel_test_drv.c
-
DEPPATH += --dep-path kernel_test
VPATH += :kernel_test
-
+endif
