Fix UI tests

Author: antoyo

failing-ui-tests.txt

@@ -68,3 +68,6 @@ tests/ui/lto/thin-lto-global-allocator.rs
 tests/ui/lto/msvc-imp-present.rs
 tests/ui/lto/lto-thin-rustc-loads-linker-plugin.rs
 tests/ui/lto/all-crates.rs
+tests/ui/async-await/deep-futures-are-freeze.rs
+tests/ui/closures/capture-unsized-by-ref.rs
+tests/ui/generator/resume-after-return.rs

test.sh

@@ -359,6 +359,7 @@ function test_rustc() {
     git checkout tests/ui/macros/rfc-2011-nicer-assert-messages/auxiliary/common.rs
     git checkout tests/ui/imports/ambiguous-1.rs
     git checkout tests/ui/imports/ambiguous-4-extern.rs
+    git checkout tests/ui/entry-point/auxiliary/bad_main_functions.rs
 
     RUSTC_ARGS="$TEST_FLAGS -Csymbol-mangling-version=v0 -Zcodegen-backend="$(pwd)"/../target/"$CHANNEL"/librustc_codegen_gcc."$dylib_ext" --sysroot "$(pwd)"/../build_sysroot/sysroot"