Merge branch 'bugfix/osx_menuconfig_build' into 'master'

Allow OS X to build without libintl

https://github.com/espressif/esp-idf/pull/42

I have tested this with the following configurations:
- OS X with Xcode command line tools, no macports, no homebrew
- OS X with Xcode command line tools and homebrew
- OS X with Xcode IDE and macports

All three work with this change, without it the first two had issues.

See merge request !172

tools/kconfig/lxdialog/check-lxdialog.sh

@@ -5,8 +5,8 @@
 ldflags()
 {
 	if [ $(uname -s) == "Darwin" ]; then 
-		#OSX seems to need intl too
-		echo -n "-lintl "
+		#OSX seems to need ncurses too
+		echo -n "-lncurses "
 	fi
 	pkg-config --libs ncursesw 2>/dev/null && exit
 	pkg-config --libs ncurses 2>/dev/null && exit
@@ -41,6 +41,10 @@ ccflags()
 	else
 		echo '-DCURSES_LOC="<curses.h>"'
 	fi
+	if [ $(uname -s) == "Darwin" ]; then
+		#OSX doesn't have libintl
+		echo -n "-DKBUILD_NO_NLS -Wno-format-security "
+	fi
 }
 
 # Temp file, try to clean up after us