cypress: Add support for watchdog timer update in boot image

Add watchdog timer to MCUBootApp plus BlinkyApp to implement  additional way of boot/upgrade image operation confirmation.

Signed-off-by: Roman Okhrimenko <roman.okhrimenko@cypress.com>
diff --git a/boot/cypress/BlinkyApp/libs.mk b/boot/cypress/BlinkyApp/libs.mk
index 0fbcf75..9f1846c 100644
--- a/boot/cypress/BlinkyApp/libs.mk
+++ b/boot/cypress/BlinkyApp/libs.mk
@@ -35,6 +35,7 @@
 
 # Collect source files for Retarget-io
 SOURCES_RETARGET_IO := $(wildcard $(CUR_LIBS_PATH)/retarget-io/*.c)
+SOURCES_WATCHDOG := $(wildcard $(CUR_LIBS_PATH)/watchdog/*.c)
 
 # Collect source files for HAL
 SOURCES_HAL := $(wildcard $(CUR_LIBS_PATH)/psoc6hal/COMPONENT_PSOC6HAL/source/*.c)
@@ -49,6 +50,7 @@
 
 # Retarget-io related include directories
 INCLUDE_DIRS_RETARGET_IO := $(CUR_LIBS_PATH)/retarget-io
+INCLUDE_DIRS_WATCHDOG := $(CUR_LIBS_PATH)/watchdog
 
 # core-libs related include directories
 INCLUDE_DIRS_CORE_LIB := $(CUR_LIBS_PATH)/core-lib/include
@@ -63,12 +65,14 @@
 SOURCES_LIBS := $(SOURCES_PDL)
 SOURCES_LIBS += $(SOURCES_PLATFORM)
 SOURCES_LIBS += $(SOURCES_RETARGET_IO)
+SOURCES_LIBS += $(SOURCES_WATCHDOG)
 SOURCES_LIBS += $(SOURCES_HAL)
 
 # Collected include directories for libraries
 INCLUDE_DIRS_LIBS := $(addprefix -I,$(INCLUDE_DIRS_PDL))
 INCLUDE_DIRS_LIBS += $(addprefix -I,$(INCLUDE_DIRS_PLATFORM))
 INCLUDE_DIRS_LIBS += $(addprefix -I,$(INCLUDE_DIRS_RETARGET_IO))
+INCLUDE_DIRS_LIBS += $(addprefix -I,$(INCLUDE_DIRS_WATCHDOG))
 INCLUDE_DIRS_LIBS += $(addprefix -I,$(INCLUDE_DIRS_CORE_LIB))
 INCLUDE_DIRS_LIBS += $(addprefix -I,$(INCLUDE_DIRS_HAL))