package: dhcpcd: fix dhcpcd binary not stripped

By default dhcpcd installed with 555 permissions as it is
configured in its Makefile.inc. Since 'w' bit is missing,
strip fails and dhcpcd binary installed non-stripped.

On ARM GCC 12 glibc configuration strip saves over 1MB of disk space.

Signed-off-by: Oleg Lyovin <ovlevin@salutedevices.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 72c3f87efacbf593abebe798321f9ecda7adc2d3)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/dhcpcd/dhcpcd.mk

@@ -17,6 +17,9 @@ DHCPCD_CONFIG_OPTS = \
 	--os=linux \
 	--privsepuser=dhcpcd
 
+DHCPCD_MAKE_OPTS = \
+	BINMODE=755
+
 ifeq ($(BR2_PACKAGE_DHCPCD_ENABLE_PRIVSEP),y)
 DHCPCD_CONFIG_OPTS += --enable-privsep
 else
@@ -43,11 +46,11 @@ define DHCPCD_CONFIGURE_CMDS
 endef
 
 define DHCPCD_BUILD_CMDS
-	$(TARGET_MAKE_ENV) $(MAKE) -C $(@D) all
+	$(TARGET_MAKE_ENV) $(MAKE) -C $(@D) $(DHCPCD_MAKE_OPTS) all
 endef
 
 define DHCPCD_INSTALL_TARGET_CMDS
-	$(TARGET_MAKE_ENV) $(MAKE) -C $(@D) install DESTDIR=$(TARGET_DIR)
+	$(TARGET_MAKE_ENV) $(MAKE) -C $(@D) $(DHCPCD_MAKE_OPTS) install DESTDIR=$(TARGET_DIR)
 endef
 
 # When network-manager is enabled together with dhcpcd, it will use