Create libbase.

Move StringPrintf and the string based file I/O from libutils to
libbase.

Change-Id: I0297a6063874b9d92100e0dd5123fddfbda932fe
diff --git a/init/Android.mk b/init/Android.mk
index ec2861b..5b8094f 100644
--- a/init/Android.mk
+++ b/init/Android.mk
@@ -27,6 +27,7 @@
     parser.cpp \
     util.cpp \
 
+LOCAL_STATIC_LIBRARIES := libbase
 LOCAL_MODULE := libinit
 include $(BUILD_STATIC_LIBRARY)
 
@@ -55,7 +56,7 @@
     libfs_mgr \
     liblogwrap \
     libcutils \
-    libutils \
+    libbase \
     liblog \
     libc \
     libselinux \
@@ -80,7 +81,7 @@
 
 LOCAL_SHARED_LIBRARIES += \
     libcutils \
-    libutils \
+    libbase \
 
 LOCAL_STATIC_LIBRARIES := libinit
 include $(BUILD_NATIVE_TEST)