libbase.mk: modifications to make it build in yocto environment

Adding an include file that is setting the common flags.
Changed the cppflag to include the headers from other components
of android-tools

Modified LDflags so that the libraries that are coming from other android-tools
are searched in the output folder.

Modified the build rule so that it outputs the binary to the OUT_DIR

Signed-off-by: Nisha Parrakat <Nisha.Parrakat@kpit.com>

--- git/system/core/debian/libbase.mk	2021-04-29 22:01:13.664181133 +0200
+++ git/system/core/debian/libbase.mk	2021-04-29 22:04:52.328123833 +0200
@@ -1,3 +1,4 @@
+include ../../rules_yocto.mk
 NAME = libbase
 SOURCES = \
           chrono_utils.cpp \
@@ -20,8 +21,9 @@
 LDFLAGS += -shared -Wl,-soname,$(NAME).so.0
 
 build: $(SOURCES)
-	$(CXX) $^ -o $(NAME).so.0 $(CXXFLAGS) $(CPPFLAGS) $(LDFLAGS)
-	ln -s $(NAME).so.0 $(NAME).so
+	$(CXX) $^ -o $(OUT_DIR)/usr/lib/$(DEB_HOST_MULTIARCH)/android/$(NAME).so.0 $(CXXFLAGS) $(CPPFLAGS) $(LDFLAGS)
+	ln -s $(NAME).so.0 $(OUT_DIR)/usr/lib/$(DEB_HOST_MULTIARCH)/android/$(NAME).so
+	cp -r base/include/* $(OUT_DIR)/usr/include/
 
 clean:
-	$(RM) $(NAME).so*
+	$(RM) $(OUT_DIR)/usr/lib/$(DEB_HOST_MULTIARCH)/android/$(NAME).so*