Include the amr wb encoder shared library in all builds.

Change-Id: I5f61c696336cf77d49d08b6f99d60046774e91f2
diff --git a/target/product/core.mk b/target/product/core.mk
index a8d2746..06cc6b3 100644
--- a/target/product/core.mk
+++ b/target/product/core.mk
@@ -89,6 +89,7 @@
     libstagefright_soft_aacenc \
     libstagefright_soft_amrdec \
     libstagefright_soft_amrnbenc \
+    libstagefright_soft_amrwbenc \
     libstagefright_soft_g711dec \
     libstagefright_soft_h264dec \
     libstagefright_soft_mp3dec \