fix yellow build issue

Makefile

@@ -30,7 +30,7 @@ all:  green_wp85  green_wp750x  green_wp76xx  green_wp77xx \
 LEGATO ?= 1
 .PHONY: legato_%
 legato_%:
-	$(eval LEGATO_TARGET := $(subst legato_,,$@))
+	$(eval export LEGATO_TARGET := $(subst legato_,,$@))
 ifeq ($(LEGATO),0)
 	echo "Not building LEGATO due to \$$LEGATO == 0"
 else

linux_kernel_modules/cypwifi/build.sh

-#
+#!/bin/sh
+
 # We Assume that the user has run cfglegato previously to make many
 # environment variables exportable
 
@@ -34,7 +35,7 @@ export CROSS_COMPILE=`${FINDTOOLCHAIN} ${LEGATO_TARGET} prefix`
 # Lets do it
 OLDPWD=`pwd`
 cd ${MANGOH_ROOT}/build/${1}/modules/cypwifi
-if [ "$2" == "clean" ] ; then
+if [ "$2" = "clean" ] ; then
 	make defconfig-brcmfmac
 fi
 make modules