lmfit: mark vendor

This allows vendor modules to use this library when
BOARD_VNDK_VERSION:=current is enabled.

Test: links
Bug: 37342627
Change-Id: I5585dbb6acb3bd128748ab7bef12c248f877bb1e
diff --git a/Android.bp b/Android.bp
index 26f29e1..a65d618 100644
--- a/Android.bp
+++ b/Android.bp
@@ -14,6 +14,7 @@
 
 cc_library_static {
     name: "lmfit",
+    vendor: true,
 
     srcs: [
         "lib/lmcurve.c",