Ignore broken and non-applicable tests

c-link-to-rust-va-list-fn: unstable feature, broken on aarch64, rust-lang#56475
env-funky-keys: can't handle LD_PRELOAD (e.g. sandbox)
long-linker-command-lines: takes >10 minutes to run (but still passes)
simd-intrinsic-generic-bitmask.rs: broken on BE, rust-lang#59356
sparc-struct-abi: no sparc target
sysroot-crates-are-unstable: can't run rustc without RPATH

Author: smaeul

Diff for: src/test/codegen/sparc-struct-abi.rs

@@ -4,6 +4,7 @@
 
 // only-sparc64
 // compile-flags: -O --target=sparc64-unknown-linux-gnu --crate-type=rlib
+// ignore-test
 #![feature(no_core, lang_items)]
 #![no_core]
 

Diff for: src/test/run-make-fulldeps/c-link-to-rust-va-list-fn/Makefile

@@ -1,3 +1,5 @@
+# ignore-aarch64
+
 -include ../tools.mk
 
 all:

Diff for: src/test/run-make-fulldeps/long-linker-command-lines/Makefile

@@ -1,3 +1,5 @@
+# ignore-test
+
 -include ../tools.mk
 
 all:

Diff for: src/test/run-make-fulldeps/sysroot-crates-are-unstable/Makefile

@@ -1,3 +1,5 @@
+# ignore-test
+
 -include ../tools.mk
 
 all:

Diff for: src/test/ui/env-funky-keys.rs

@@ -1,6 +1,7 @@
 // run-pass
 // Ignore this test on Android, because it segfaults there.
 
+// ignore-test
 // ignore-android
 // ignore-windows
 // ignore-cloudabi no execve

Diff for: src/test/ui/simd/simd-intrinsic-generic-bitmask.rs

@@ -2,6 +2,8 @@
 #![allow(non_camel_case_types)]
 
 // ignore-emscripten
+// ignore-powerpc
+// ignore-powerpc64
 
 // Test that the simd_bitmask intrinsic produces correct results.