Generate symlinks to libwebviewchromium.so in /system/priv-app

This change declares libwebviewchromium to be treated as a JNI lib
for the webviewchromium.apk. By doing this, the build system will
create symlinks from /system/app-priv/webviewchromium/lib/...
(which is the path returned by the package manager) to the actual
libraries in /system/lib*.
Furthermore this change also declares the apk to be a multilib
target, so that both libraries get symlinked on multi-arch devices.

BUG:16403706
Change-Id: Ib02191eddf8262b2b23c3c32d07e77b33759285d
diff --git a/chromium/Android.mk b/chromium/Android.mk
index 81d9ec7..0577b67 100644
--- a/chromium/Android.mk
+++ b/chromium/Android.mk
@@ -40,6 +40,10 @@
 
 LOCAL_JARJAR_RULES := $(CHROMIUM_PATH)/android_webview/build/jarjar-rules.txt
 
+LOCAL_JNI_SHARED_LIBRARIES += libwebviewchromium
+
+LOCAL_MULTILIB := both
+
 include $(CHROMIUM_PATH)/android_webview/build/resources_config.mk
 LOCAL_RESOURCE_DIR := \
     $(LOCAL_PATH)/res \