eglibc compiles fine with -Os, at least for x86_64,sparc64,mips,mipsel and arm, still breakage with x86

toolchain/eglibc/Makefile

@@ -7,11 +7,6 @@ include Makefile.inc
 include Makefile.multilib
 include ${TOPDIR}/mk/buildhlp.mk
 
-# eglibc does not compile with Os
-TARGET_CFLAGS_LIBC:= $(subst Os,O2,$(TARGET_CFLAGS))
-ifneq ($(ADK_DEBUG),)
-TARGET_CFLAGS_LIBC+=		-O2
-endif
 # ssp partially supported
 TARGET_CFLAGS_LIBC:= 	$(filter-out -fstack-protector,$(TARGET_CFLAGS_LIBC))