treewide: opt-out of tree-wide LTO usage

These fail to build with LTO enabled or packages depending on them do.

Signed-off-by: Andre Heider <a.heider@gmail.com>

package/boot/grub2/Makefile

@@ -25,6 +25,7 @@ ifneq ($(BUILD_VARIANT),none)
 endif
 
 PKG_FLAGS:=nonshared
+PKG_BUILD_FLAGS:=no-lto
 
 include $(INCLUDE_DIR)/host-build.mk
 include $(INCLUDE_DIR)/package.mk

package/libs/argp-standalone/Makefile

@@ -19,6 +19,8 @@ PKG_MAINTAINER:=Ted Hess <thess@kitschensync.net>
 PKG_LICENSE:=LGPL-2.1
 PKG_LICENSE:=Makefile.am
 
+PKG_BUILD_FLAGS:=no-lto
+
 include $(INCLUDE_DIR)/package.mk
 include $(INCLUDE_DIR)/host-build.mk
 

package/libs/mbedtls/Makefile

@@ -10,7 +10,7 @@ include $(TOPDIR)/rules.mk
 PKG_NAME:=mbedtls
 PKG_VERSION:=2.28.2
 PKG_RELEASE:=2
-PKG_BUILD_FLAGS:=no-mips16 gc-sections
+PKG_BUILD_FLAGS:=no-mips16 gc-sections no-lto
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://codeload.github.com/ARMmbed/mbedtls/tar.gz/v$(PKG_VERSION)?