Build native code for multiple architectures.

* Include native libs without requiring intermediate .jar.
 * Fix build warnings; use latest build tools.

BUILDING.md

@@ -6,3 +6,17 @@ Building TextSecure
 Execute Gradle:
 
     ./gradlew build
+
+Re-building native components
+-----------------------------
+
+Note: This step is optional; native components are contained as binaries (see [library/libs](library/libs)).
+
+1. Ensure that the Android NDK is installed.
+
+Execute ndk-build:
+
+    cd library
+    ndk-build
+
+Afterwards, execute Gradle as above to re-create the APK.

build.gradle

@@ -29,7 +29,7 @@ dependencies {
 
 android {
     compileSdkVersion 19
-    buildToolsVersion '19.0.0'
+    buildToolsVersion '19.0.2'
 
     defaultConfig {
         minSdkVersion 9
@@ -42,7 +42,7 @@ android {
                 manifest.srcFile 'AndroidManifest.xml'
                 java.srcDirs = ['src']
                 resources.srcDirs = ['src']
-                aild.srcDirs = ['src']
+                aidl.srcDirs = ['src']
                 renderscript.srcDirs = ['src']
                 res.srcDirs = ['res']
                 assets.srcDirs = ['assets']

library/build.gradle

@@ -23,12 +23,11 @@ dependencies {
     compile 'com.madgag:sc-light-jdk15on:1.47.0.2'
     compile 'com.googlecode.libphonenumber:libphonenumber:5.3'
     compile 'org.whispersystems:gson:2.2.4'
-    compile fileTree(dir: 'libs', include: 'armeabi.jar')
 }
 
 android {
     compileSdkVersion 19
-    buildToolsVersion '19.0.0'
+    buildToolsVersion '19.0.2'
 
     android {
         sourceSets {
@@ -36,10 +35,11 @@ android {
                 manifest.srcFile 'AndroidManifest.xml'
                 java.srcDirs = ['src']
                 resources.srcDirs = ['src']
-                aild.srcDirs = ['src']
+                aidl.srcDirs = ['src']
                 renderscript.srcDirs = ['src']
                 res.srcDirs = ['res']
                 assets.srcDirs = ['assets']
+                jniLibs.srcDirs = ['libs']
             }
         }
     }

library/jni/Application.mk

@@ -0,0 +1 @@
+APP_ABI := armeabi armeabi-v7a x86