Tweak linux_glibc properties for musl builds in external/vixl am: 46089112a5 am: 436a93d15f

Original change: https://android-review.googlesource.com/c/platform/external/vixl/+/2018609

Change-Id: Ie3a46f5f10845449a5435348d195fb5ce4753c72
diff --git a/Android.bp b/Android.bp
index 23dd084..e64dec1 100644
--- a/Android.bp
+++ b/Android.bp
@@ -249,5 +249,8 @@
         linux_glibc_x86_64: {
             enabled: true,
         },
+        linux_musl_x86_64: {
+            enabled: true,
+        },
     },
 }