deps.bash: attempt to fix the windows build

Use simpler shell constructs.

R=golang-dev
CC=golang-dev
https://golang.org/cl/5297080

src/pkg/deps.bash

@@ -21,14 +21,16 @@ dirpat=$(echo $dirs C | awk '{
 		gsub("/", "\\/", x)
 		printf("/^(%s)$/\n", x)
 	}
-}'
-	# Add packages' old names. TODO: clean up after renaming.
-	echo "/^(asn1)$/"
-	echo "/^(csv)$/"
-	echo "/^(gob)$/"
-	echo "/^(json)$/"
-	echo "/^(xml)$/"
-)
+}')
+
+# Append old names of renamed packages. TODO: clean up after renaming.
+dirpat="$dirpat
+/^(asn1)$/
+/^(csv)$/
+/^(gob)$/
+/^(json)$/
+/^(xml)$/
+"
 
 for dir in $dirs; do (
 	cd $dir >/dev/null || exit 1
@@ -47,15 +49,12 @@ for dir in $dirs; do (
 		grep -v "^$dir\$" |
 		sed 's/$/.install/' |
 		# TODO: rename the dependencies for renamed directories.  TODO: clean up after renaming.
-		# awk is overkill but it's easy to understand.
-		awk '
-			/^asn1.install$/ { print "encoding/asn1.install"; next }
-			/^csv.install$/ { print "encoding/csv.install"; next }
-			/^gob.install$/ { print "encoding/gob.install"; next }
-			/^json.install$/ { print "encoding/json.install"; next }
-			/^xml.install$/ { print "encoding/xml.install"; next }
-			{print}
-		' |
+		sed 's;^asn1.install$;encoding/asn1.install;' |
+		sed 's;^csv.install$;encoding/csv.install;' |
+		sed 's;^gob.install$;encoding/gob.install;' |
+		sed 's;^json.install$;encoding/json.install;' |
+		sed 's;^xml.install$;encoding/xml.install;' |
+		# TODO: end of renamings.
 		sed 's;^C\.install;runtime/cgo.install;' |
 		sort -u
 	)