sys: implement tests for native mutex and cond API

JIRA: RTOS-870

sys/Makefile

@@ -0,0 +1,20 @@
+# Custom name as LOCAL_DIR is auto-reset by binary.mk
+MY_LOCAL_DIR := $(call my-dir)
+
+SYS_UNIT_TESTS :=
+
+# Quick template for adding sys tests from subdir (makes test-sys-xxx binary from xxx/*.c)
+# $(eval $(call add_sys_test,NAME[,LOCAL_LDFLAGS][,LOCAL_CFLAGS]))
+define add_test_sys
+NAME := test-sys-$(1)
+SYS_UNIT_TESTS += test-sys-$(1)
+SRCS := $(wildcard $(MY_LOCAL_DIR)$(1)/*.c)
+DEP_LIBS := unity
+LOCAL_CFLAGS := -fno-builtin $(3)
+LOCAL_LDFLAGS := $(2)
+
+include $(binary.mk)
+endef
+
+$(eval $(call add_test_sys,cond))
+$(eval $(call add_test_sys,mutex))