don't compile unit test libs for integration

Author: Baraa-Hasheesh

Makefile

@@ -242,6 +242,7 @@ build-test-cpp: build/test/cpptests build/test/build-unit-test-libs
 build-test: build-test-cpp build-test-java
 
 build/test/build-unit-test-libs: $(CPP_TEST_LIB_SOURCES)
+ifneq ($(RUN_CPP_TESTS),)
 	@mkdir -p $(TEST_LIB_DIR)
 	$(CC) -shared -fPIC -o $(TEST_LIB_DIR)/libreladyn.$(SOEXT) test/native/libs/reladyn.c
 
@@ -256,6 +257,7 @@ ifeq ($(OS_TAG),linux)
 	$(LD) -shared -o $(TEST_LIB_DIR)/libtwiceatzero.$(SOEXT) $(TEST_LIB_DIR)/twiceatzero.o --section-start=.seg1=0x4000 -z max-page-size=0x1000
 endif
 	@touch $@
+endif
 
 build/test/build-integ-test-libs: $(CPP_TEST_LIB_SOURCES)
 	@mkdir -p $(TEST_LIB_DIR)