Made the unix build scripts more portable. It will be necessary to

rerun './build.sh config' as build.vars.in has been modified.
Also fixed some small bugs in the redirection of text to /dev/null.


git-svn-id: svn://svn.code.sf.net/p/sc2/code/trunk@1413 8092fc87-c524-0410-9efc-e669fe64eaf9

sc2/build/unix/build.sh

@@ -88,7 +88,7 @@ if [ -z "$TARGET" ]; then
 	exit 1
 fi
 BUILD_PROJECT="$TARGET"
-export TARGET BUILD_PROJECT COMPILE MKDEPEND
+export TARGET BUILD_PROJECT COMPILE MKDEPEND ECHON
 export "${BUILD_PROJECT}_CFLAGS" "${BUILD_PROJECT}_LDFLAGS" 
 
 # Add trailing / from objs dir