Move entry point and exception vector to library.

Bug: 223166344
Test: Ran unprotected VM under crosvm.
Change-Id: Id0189800ff9fc896989c838e3b30d88494e99cd5
diff --git a/pvmfw/Android.bp b/pvmfw/Android.bp
index 3b5df7f..c855b34 100644
--- a/pvmfw/Android.bp
+++ b/pvmfw/Android.bp
@@ -27,12 +27,11 @@
 cc_binary {
     name: "pvmfw",
     srcs: [
-        "entry.S",
-        "exceptions.S",
         "idmap.S",
     ],
     static_libs: [
         "libpvmfw",
+        "libvmbase_entry",
     ],
     static_executable: true,
     nocrt: true,