noip: add $(TARGET_MAKE_ENV) before $(MAKE)

For consistency reasons, this commit adjusts the noip package to pass
$(TARGET_MAKE_ENV) in the environment when calling $(MAKE).

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/noip/noip.mk

@@ -12,8 +12,8 @@ NOIP_LICENSE_FILES = COPYING
 
 define NOIP_BUILD_CMDS
 	$(SED) "/^#define CONFIG_FILENAME/ s/PREFIX//" $(@D)/noip2.c
-	$(MAKE) -C $(@D) CC="$(TARGET_CC)" CFLAGS="$(TARGET_CFLAGS)" \
-		PREFIX=/usr CONFDIR=/etc
+	$(TARGET_MAKE_ENV) $(MAKE) -C $(@D) CC="$(TARGET_CC)" \
+		CFLAGS="$(TARGET_CFLAGS)" PREFIX=/usr CONFDIR=/etc
 endef
 
 define NOIP_INSTALL_TARGET_CMDS