iproute2: fixup CCOPTS to unbreak build

CCOPTS is also used for HOSTCC in the netem/ directory which contains
host tools so just ditch it there to avoid extra non-native
optimizations to sweep by.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/iproute2/iproute2.mk

@@ -34,6 +34,7 @@ define IPROUTE2_CONFIGURE_CMDS
 endef
 
 define IPROUTE2_BUILD_CMDS
+	$(SED) 's/$$(CCOPTS)//' $(@D)/netem/Makefile
 	$(MAKE) CC="$(TARGET_CC)" CCOPTS="$(TARGET_CFLAGS) -D_GNU_SOURCE" -C $(@D)
 endef