Make the /system/bin/sh link so installer.c works.

The recent change to system/core/sh (bdc36d6) broke installer.c. This is easily
fixed by restoring /system/bin/sh as a symlink to ash.

Change-Id: Ie401adc4403faec0254169f9453aaf8bcbb37820
Signed-off-by: Bruce Beare <brucex.j.beare@intel.com>
diff --git a/config.mk b/config.mk
index 11f17fc..c01d188 100644
--- a/config.mk
+++ b/config.mk
@@ -12,7 +12,7 @@
 	libm \
 	libstdc++ \
 	linker \
-	sh \
+	ash \
 	toolbox \
 	logcat \
 	gdbserver \
diff --git a/init.rc b/init.rc
index 48cf3ca..5ba0f18 100644
--- a/init.rc
+++ b/init.rc
@@ -4,6 +4,7 @@
     export ANDROID_DATA /data
 
     symlink /system/etc /etc
+    symlink /system/bin/ash /system/bin/sh
 
     mkdir /data
     mkdir /cache