Fix module-file name collisions

Bazel doesn't allow a module and file with the same name.

Bug: 198619163
Test: Presubmits
Change-Id: I345086764071ca649de1ac11804e21675cd5e59d
diff --git a/init/Android.bp b/init/Android.bp
index 20d622d..6255305 100644
--- a/init/Android.bp
+++ b/init/Android.bp
@@ -276,7 +276,7 @@
                 "init.rc",
                 "ueventd.rc",
                 "e2fsdroid",
-                "extra_free_kbytes.sh",
+                "extra_free_kbytes",
                 "make_f2fs",
                 "mke2fs",
                 "sload_f2fs",
@@ -609,6 +609,7 @@
 }
 
 sh_binary {
-    name: "extra_free_kbytes.sh",
+    name: "extra_free_kbytes",
     src: "extra_free_kbytes.sh",
+    filename_from_src: true,
 }