libcoap: make sure `libcoap-3-notls.so` is installed

This commit fixes an issue where the `libcoap-3-notls.so` is not installed,
in some cases leaving the target's root with no library and just a broken link
from `libcoap-3.so` to `libcoap-3-notls.so`.

Signed-off-by: Leo Soares <leo@hyper.ag>
(cherry picked from commit 80c4d675c2)

libs/libcoap/Makefile

@@ -79,7 +79,7 @@ endef
 
 define Package/libcoap/install
 	$(INSTALL_DIR) $(1)/usr/lib
-	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libcoap-$(ABI_VERSION).so* $(1)/usr/lib/
+	$(CP) $(PKG_INSTALL_DIR)/usr/lib/libcoap-$(ABI_VERSION)*.so* $(1)/usr/lib/
 endef
 
 define Package/coap-client/install