[source] rootfs: remove unnecessary and potentially harmful force flags from opkg call

[LEDE Commits]

neoraider pushed a commit to source.git, branch master:
https://git.lede-project.org/021b96d7c5c668fbcb5375c65cee90832bb2854f

commit 021b96d7c5c668fbcb5375c65cee90832bb2854f
Author: Matthias Schiffer <mschiffer at universe-factory.net>
AuthorDate: Mon Sep 26 15:25:38 2016 +0200

    rootfs: remove unnecessary and potentially harmful force flags from opkg call
    
    Especially --force-overwrite and --force-depends will often lead to broken
    images; it's better to fail the build in such cases than to silently ignore
    the errors.
    
    Instead, ignore errors in the per-device rootfs opkg remove command, so
    the build doesn't break when packages can't be removed because of
    dependencies.
    
    Signed-off-by: Matthias Schiffer <mschiffer at universe-factory.net>
---
 include/image.mk  | 2 +-
 include/rootfs.mk | 3 ---
 2 files changed, 1 insertion(+), 4 deletions(-)

diff --git a/include/image.mk b/include/image.mk
index 18a3ed8..8b7d91d 100644
--- a/include/image.mk
+++ b/include/image.mk
@@ -288,7 +288,7 @@ target-dir-%: FORCE
 	-mv $(mkfs_cur_target_dir)/etc/opkg $(mkfs_cur_target_dir).opkg
 	echo 'src default file://$(PACKAGE_DIR_ALL)' > $(mkfs_cur_target_dir).conf
 	$(if $(mkfs_packages_remove), \
-		$(call opkg,$(mkfs_cur_target_dir)) remove \
+		-$(call opkg,$(mkfs_cur_target_dir)) remove \
 			$(mkfs_packages_remove))
 	$(if $(call opkg_package_files,$(mkfs_packages_add)), \
 		$(opkg_target) update && \
diff --git a/include/rootfs.mk b/include/rootfs.mk
index 6a66100..15f71ae 100644
--- a/include/rootfs.mk
+++ b/include/rootfs.mk
@@ -40,10 +40,7 @@ opkg = \
   TMPDIR=$(1)/tmp \
   $(STAGING_DIR_HOST)/bin/opkg \
 	--offline-root $(1) \
-	--force-depends \
-	--force-overwrite \
 	--force-postinstall \
-	--force-maintainer \
 	--add-dest root:/ \
 	--add-arch all:100 \
 	--add-arch $(if $(ARCH_PACKAGES),$(ARCH_PACKAGES),$(BOARD)):200