Add support for AArch64 XOM binaries.

Adds build system support for generating AArch64 binaries with
execute-only memory layouts via a new xom module property. Also adds
support for an ENABLE_XOM build flag for global builds.

Bug: 77958880
Test: make -j ENABLE_XOM=true
Change-Id: Ia2ea981498dd12941aaf5ca807648ae37527e3ee
diff --git a/Android.bp b/Android.bp
index ef42c84..be9cf2a 100644
--- a/Android.bp
+++ b/Android.bp
@@ -145,6 +145,7 @@
         "cc/util.go",
         "cc/vndk.go",
         "cc/vndk_prebuilt.go",
+        "cc/xom.go",
 
         "cc/cmakelists.go",
         "cc/compdb.go",