test: fix test after emscripten removed from io

There was a special case where tests were skipped on emscripten.
This is no longer the case, and as a result the patch no longer
applied.

Remove emscripten to get the patch to apply once again.

Signed-off-by: Sean Cross <[email protected]>

0004-std-not-for-upstreaming-customize-tests-for-Xous.patch

@@ -1,7 +1,7 @@
-From 6b8975e7371f9c209dad6956b179ca99d874a509 Mon Sep 17 00:00:00 2001
+From 84acc1fc34bcbf9b791c820d92075c5b72c5c655 Mon Sep 17 00:00:00 2001
 From: Sean Cross <[email protected]>
 Date: Sun, 24 Dec 2023 15:15:01 +0800
-Subject: [PATCH 4/5] std: (not for upstreaming) customize tests for Xous
+Subject: [PATCH 4/4] std: (not for upstreaming) customize tests for Xous
 
 Signed-off-by: Sean Cross <[email protected]>
 ---
@@ -13,7 +13,7 @@ Signed-off-by: Sean Cross <[email protected]>
  5 files changed, 12 insertions(+), 11 deletions(-)
 
 diff --git a/library/std/src/collections/hash/map/tests.rs b/library/std/src/collections/hash/map/tests.rs
-index b79ad1c3119..7568db8f59e 100644
+index a275488a556..de39d521d36 100644
 --- a/library/std/src/collections/hash/map/tests.rs
 +++ b/library/std/src/collections/hash/map/tests.rs
 @@ -270,11 +270,11 @@ fn test_lots_of_insertions() {
@@ -31,13 +31,13 @@ index b79ad1c3119..7568db8f59e 100644
          for i in 1..count {
              assert!(m.insert(i, i).is_none());
 diff --git a/library/std/src/io/tests.rs b/library/std/src/io/tests.rs
-index 56b71c47dc7..6cf742c9a46 100644
+index 226cc6011bc..42d015fd13f 100644
 --- a/library/std/src/io/tests.rs
 +++ b/library/std/src/io/tests.rs
-@@ -360,6 +360,7 @@ fn chain_zero_length_read_is_not_eof() {
+@@ -358,6 +358,7 @@ fn chain_zero_length_read_is_not_eof() {
+ }
 
  #[bench]
- #[cfg_attr(target_os = "emscripten", ignore)]
 +#[cfg_attr(target_os = "xous", ignore)]
  #[cfg_attr(miri, ignore)] // Miri isn't fast...
  fn bench_read_to_end(b: &mut test::Bencher) {
@@ -136,5 +136,5 @@ index e88f2d5e806..ae9b48e4b7e 100644
                      let new = Instant::now();
                      assert!(new >= old);
 -- 
-2.34.1
+2.47.0