Move memchecker initialization from main.c to vl-android.c (core)

Also move qemu-malloc.c to common CORE and UI sources

Change-Id: Ifd62ae247cc03700d85b5fc35072d73ac37cc570
diff --git a/Makefile.android b/Makefile.android
index 779653c..a5e5de3 100644
--- a/Makefile.android
+++ b/Makefile.android
@@ -640,7 +640,6 @@
                     shaper.c \
                     charpipe.c \
                     tcpdump.c \
-                    qemu-malloc.c \
                     qemu-option.c \
                     savevm.c \
                     net-android.c \
@@ -719,6 +718,7 @@
                       cutils.c \
                       sockets.c \
                       keymaps.c \
+                      qemu-malloc.c \
                       android/keycode-array.c \
                       android/charmap.c \
                       android/hw-qemud.c \