Disable fortify tests for musl

musl doesn't have fortify, and is missing the *_chk symbols to allow
the tests to compile.

Bug: 190084016
Test: m USE_HOST_MUSL=true host-native
Change-Id: I9a1d2dfe19db219cd2c5a6dc39cb5d08ed0e4369
diff --git a/tests/Android.bp b/tests/Android.bp
index 3c052be..c077847 100644
--- a/tests/Android.bp
+++ b/tests/Android.bp
@@ -599,6 +599,10 @@
         host: {
             clang_cflags: ["-D__clang__"],
         },
+        musl: {
+            // Musl doesn't have fortify
+            enabled: false,
+        },
     },
 }
 
@@ -720,6 +724,7 @@
 cc_test_library {
     name: "libBionicTests",
     defaults: ["bionic_tests_defaults"],
+    host_supported: false,
     whole_static_libs: [
         "libBionicStandardTests",
         "libBionicElfTlsTests",