Disable warnings for Windows

Bug: http://b/69933068

Disable -Wunused-parameter, which is emitted when using Clang to build
Windows host modules. ('path' parameter to f2fs_dev_is_umounted in
lib/libf2fs.c).

Disable -Wtypedef-redefinition to silence redefintion of u8, u16, u32,
u64 in include/f2fs_fs.h.

Test: m native-host-cross with clang
Change-Id: I924080ded9443fb60fb91ab38ed41585c44d3e01
diff --git a/Android.bp b/Android.bp
index d9d72b4..dcbb034 100644
--- a/Android.bp
+++ b/Android.bp
@@ -86,7 +86,11 @@
     target: {
         windows: {
             include_dirs: [ "external/e2fsprogs/include/mingw" ],
-            cflags: ["-DANDROID_WINDOWS_HOST"],
+            cflags: [
+                "-DANDROID_WINDOWS_HOST",
+                "-Wno-typedef-redefinition",
+                "-Wno-unused-parameter",
+            ],
             enabled: true
 	},
     },