opengl: make gl_headers available to host modules

Bug: 141989085
Test: build
Change-Id: I3dc40c1443c4db03ccf928dfa43263dc095a2d6c
diff --git a/opengl/Android.bp b/opengl/Android.bp
index 48abdce..8b94f61 100644
--- a/opengl/Android.bp
+++ b/opengl/Android.bp
@@ -54,6 +54,7 @@
 
 cc_library_headers {
     name: "gl_headers",
+    host_supported: true,
     vendor_available: true,
     export_include_dirs: ["include"],
 }