fix static build, where libthread_db.so might not exist

package/libthread_db/Makefile

@@ -35,7 +35,7 @@ ifeq ($(ADK_TARGET_USE_STATIC_LIBS),)
 ifeq ($(ADK_TARGET_LIB_MUSL),)
 ifeq (${ADK_TARGET_UCLINUX},)
 	${INSTALL_DIR} ${IDIR_LIBTHREAD_DB}/$(ADK_TARGET_LIBC_PATH)
-	${CP} ${STAGING_TARGET_DIR}/lib/libthread_db*.so* ${IDIR_LIBTHREAD_DB}/$(ADK_TARGET_LIBC_PATH)
+	-${CP} ${STAGING_TARGET_DIR}/lib/libthread_db*.so* ${IDIR_LIBTHREAD_DB}/$(ADK_TARGET_LIBC_PATH)
 endif
 endif
 endif

package/uclibc-ng/Makefile

@@ -32,7 +32,7 @@ INSTALL_STYLE:=         manual
 uclibc-ng-install:
 	$(INSTALL_DIR) $(IDIR_UCLIBC_NG)/$(ADK_TARGET_LIBC_PATH) $(IDIR_UCLIBC_NG)/etc
 	-$(CP) $(STAGING_TARGET_DIR)/uclibc-ng/lib*/* $(IDIR_UCLIBC_NG)/$(ADK_TARGET_LIBC_PATH)
-	rm $(IDIR_UCLIBC_NG)/$(ADK_TARGET_LIBC_PATH)/libthread_db*
+	-@rm $(IDIR_UCLIBC_NG)/$(ADK_TARGET_LIBC_PATH)/libthread_db* 2>/dev/null
 	test -z $(ADK_RUNTIME_TIMEZONE) || \
 	    grep $(ADK_RUNTIME_TIMEZONE) ./files/tz.lst | \
 	    cut -f 2 > $(IDIR_UCLIBC_NG)/etc/TZ