cmd/gomobile: *.aar and *.framework files are libraries

It seems like shared library terminology has left as a legacy
from the days bind command only supported Android and bind was
generating shared libraries as an output.

Additionally, rewording the mention of apks and apps.
These libraries aren't generated for apk or apps but Android IDE
or Xcode projects.

Change-Id: I46dd56ddccde2d2526fa9b69f700c48c5dd474db
Reviewed-on: https://go-review.googlesource.com/14039
Reviewed-by: Hyang-Ah Hana Kim <hyangah@gmail.com>

cmd/gomobile/bind.go

@@ -29,7 +29,7 @@ var cmdBind = &command{
 	run:   runBind,
 	Name:  "bind",
 	Usage: "[-target android|ios] [-o output] [build flags] [package]",
-	Short: "build a shared library for android APK and iOS app",
+	Short: "build a library for Android and iOS",
 	Long: `
 Bind generates language bindings for the package named by the import
 path, and compiles a library for the named target system.

cmd/gomobile/dex.go

@@ -6,7 +6,7 @@
 
 package main
 
-var dexStr = `ZGV4CjAzNQBIdedFANrzNlK7iW3fcjAaCV9Jtg0Md7iQCAAAcAAAAHhWNBIAAAAAAAAAAP` +
+var dexStr = `ZGV4CjAzNQDLd99M/fS0PS92C6RiRJwxvmoe+xpwV/GQCAAAcAAAAHhWNBIAAAAAAAAAAP` +
 	`AHAAAxAAAAcAAAABEAAAA0AQAADwAAAHgBAAACAAAALAIAABMAAAA8AgAAAQAAANQCAACc` +
 	`BQAA9AIAAHIEAAB6BAAAfgQAAJUEAACYBAAAnQQAAKMEAACoBAAArgQAALEEAAC1BAAAuQ` +
 	`QAAL4EAADcBAAA/QQAABcFAAA6BQAAXwUAAHQFAACIBQAAvQUAAN0FAADtBQAABAYAABgG` +
@@ -43,7 +43,7 @@ var dexStr = `ZGV4CjAzNQBIdedFANrzNlK7iW3fcjAaCV9Jtg0Md7iQCAAAcAAAAHhWNBIAAAAAAA
 	`dFBhY2thZ2VNYW5hZ2VyAAdnZXRSdW5lAAlnZXRTdHJpbmcACWdldFRtcGRpcgAQZ29OYX` +
 	`RpdmVBY3Rpdml0eQAEbG9hZAALbG9hZExpYnJhcnkAEmxvYWRMaWJyYXJ5IGZhaWxlZAAn` +
 	`bG9hZExpYnJhcnk6IG5vIG1hbmlmZXN0IG1ldGFkYXRhIGZvdW5kAAhtZXRhRGF0YQAIb2` +
-	`5DcmVhdGUAEAAHDjwtADEABw4BEhBLfwJ7HYdLHgAaAwAAAAcdhzQCeywgHoMAFQAHDgBA` +
+	`5DcmVhdGUAEAAHDjwtADEABw5Lo0xLfwJ7HYdLHgAaAwAAAAcdhzQCeywgHoMAFQAHDgBA` +
 	`AQAHDjw8AAEAAgMBCguBgAT0BQYCkAYPAJQHAQDoBwIBjAgAAA0AAAAAAAAAAQAAAAAAAA` +
 	`ABAAAAMQAAAHAAAAACAAAAEQAAADQBAAADAAAADwAAAHgBAAAEAAAAAgAAACwCAAAFAAAA` +
 	`EwAAADwCAAAGAAAAAQAAANQCAAABIAAABQAAAPQCAAABEAAACAAAACwEAAACIAAAMQAAAH` +

cmd/gomobile/doc.go

@@ -21,7 +21,7 @@ Usage:
 
 Commands:
 
-	bind        build a shared library for android APK and iOS app
+	bind        build a library for Android and iOS
 	build       compile android APK and iOS app
 	init        install android compiler toolchain
 	install     compile android APK and install on device
@@ -30,7 +30,7 @@ Commands:
 Use 'gomobile help [command]' for more information about that command.
 
 
-Build a shared library for android APK and iOS app
+Build a library for Android and iOS
 
 Usage: