Enable libcompiler_rt-extras under host bionic

Bug: 31559095
Test: Test linux_bionic compile
Change-Id: Ie38e64bf2b4d211ac58aaeb6e7e92e93581f1d90
diff --git a/Android.bp b/Android.bp
index e8e85dc..ffe527a 100644
--- a/Android.bp
+++ b/Android.bp
@@ -57,6 +57,9 @@
     },
 
     target: {
+        linux_bionic: {
+            enabled: true,
+        },
         windows: {
             enabled: true,
         },