Fix linker error due to missing flag

Change-Id: I613c2c421799a5515efe68f0fc38fe7544a8536a
diff --git a/BUILD.gn b/BUILD.gn
index 61b1b41..e37c6a3 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -77,10 +77,7 @@
         "PIC",
       ]
     }
-    if (is_linux || is_android) {
-      defines += [ "ELF" ]
-      include_dirs = [ "linux" ]
-    }
+    defines += [ "ELF" ]
   }
 }
 static_library("simd") {