Rename soong_jar to soong_zip

This is a general purpose tool that happens to contain some jar specific
features.

Change-Id: I05f4654d4517c245ad7a3c15492e0d2368bbf64f
diff --git a/cmd/soong_jar/rate_limit.go b/cmd/soong_zip/rate_limit.go
similarity index 100%
rename from cmd/soong_jar/rate_limit.go
rename to cmd/soong_zip/rate_limit.go
diff --git a/cmd/soong_jar/soong_jar.go b/cmd/soong_zip/soong_zip.go
similarity index 97%
rename from cmd/soong_jar/soong_jar.go
rename to cmd/soong_zip/soong_zip.go
index bca0dba..b0f3daa 100644
--- a/cmd/soong_jar/soong_jar.go
+++ b/cmd/soong_zip/soong_zip.go
@@ -77,9 +77,9 @@
 }
 
 var (
-	out          = flag.String("o", "", "file to write jar file to")
-	manifest     = flag.String("m", "", "input manifest file name")
-	directories  = flag.Bool("d", false, "include directories in jar")
+	out          = flag.String("o", "", "file to write zip file to")
+	manifest     = flag.String("m", "", "input jar manifest file name")
+	directories  = flag.Bool("d", false, "include directories in zip")
 	relativeRoot = flag.String("C", "", "path to use as relative root of files in next -f or -l argument")
 	parallelJobs = flag.Int("j", runtime.NumCPU(), "number of parallel threads to use")
 	compLevel    = flag.Int("L", 5, "deflate compression level (0-9)")
@@ -92,11 +92,11 @@
 
 func init() {
 	flag.Var(&listFiles, "l", "file containing list of .class files")
-	flag.Var(&files, "f", "file to include in jar")
+	flag.Var(&files, "f", "file to include in zip")
 }
 
 func usage() {
-	fmt.Fprintf(os.Stderr, "usage: soong_jar -o jarfile [-m manifest] -C dir [-f|-l file]...\n")
+	fmt.Fprintf(os.Stderr, "usage: soong_zip -o zipfile [-m manifest] -C dir [-f|-l file]...\n")
 	flag.PrintDefaults()
 	os.Exit(2)
 }