Disable XOM in linker, libc, and libm.

These modules have issues running with execute-only memory. Disable it
in them until we can resolve the issues.

Bug: 77958880
Test: No more XOM-related crashes in these binaries

Change-Id: Ie6c957731155566c2bbe7dbb7a91b9583d9aff93
diff --git a/linker/Android.bp b/linker/Android.bp
index 8ef540c..a9907ca 100644
--- a/linker/Android.bp
+++ b/linker/Android.bp
@@ -289,6 +289,7 @@
         },
     },
     compile_multilib: "both",
+    xom: false,
 }
 
 cc_library {