Export include dirs with -isystem am: 7f68efe4ae

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/libdrm/+/11882005

Change-Id: Iee07e1b6d4e88c419d4cdf58b8bd34284ac93440
diff --git a/Android.bp b/Android.bp
index 8b264cd..158f266 100644
--- a/Android.bp
+++ b/Android.bp
@@ -44,7 +44,7 @@
         "-Wno-unused-parameter",
         "-Wno-unused-variable",
     ],
-    export_include_dirs: ["."],
+    export_system_include_dirs: ["."],
 }
 
 // Library for the device