libcrypto_utils.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 and header to the OUT_DIR

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

--- git/system/core/debian/libcrypto_utils.mk	2021-04-30 14:18:54.071379767 +0200
+++ git/system/core/debian/libcrypto_utils.mk	2021-04-30 14:22:46.179047308 +0200
@@ -1,15 +1,17 @@
+include ../../rules_yocto.mk
 NAME:= libcrypto_utils
 SOURCES := android_pubkey.c
 SOURCES := $(foreach source, $(SOURCES), libcrypto_utils/$(source))
-CPPFLAGS += -Ilibcrypto_utils/include -Iinclude
+CPPFLAGS += -Ilibcrypto_utils/include -Iinclude -I$(OUT_DIR)/usr/include
 LDFLAGS += -shared -Wl,-soname,$(NAME).so.0 \
 	-Wl,-rpath=/usr/lib/$(DEB_HOST_MULTIARCH)/android \
-	-L/usr/lib/$(DEB_HOST_MULTIARCH)/android \
+	-L$(OUT_DIR)/usr/lib/$(DEB_HOST_MULTIARCH)/android \
 	-lcrypto -Wl,-z,defs
 
 build: $(SOURCES)
-	$(CC) $^ -o $(NAME).so.0  $(CPPFLAGS) $(LDFLAGS)
-	ln -s $(NAME).so.0 $(NAME).so
+	$(CC) $^ -o $(OUT_DIR)/usr/lib/$(DEB_HOST_MULTIARCH)/android/$(NAME).so.0  $(CPPFLAGS) $(LDFLAGS)
+	ln -sf $(NAME).so.0 $(OUT_DIR)/usr/lib/$(DEB_HOST_MULTIARCH)/android/$(NAME).so
+	cp -r libcrypto_utils/include/* $(OUT_DIR)/usr/include/
 
 clean:
-	$(RM) $(NAME).so*
+	$(RM) $(OUT_DIR)/usr/lib/$(DEB_HOST_MULTIARCH)/android/$(NAME).so*