Update Linux-specific tests

Author: petrochenkov

Diff for: tests/ui/amdgpu-require-explicit-cpu.rs

@@ -3,7 +3,6 @@
 //@ compile-flags: --crate-type=cdylib --target=amdgcn-amd-amdhsa
 //@ needs-llvm-components: amdgpu
 //@ needs-rust-lld
-//@[nocpu] error-pattern: target requires explicitly specifying a cpu
 //@[nocpu] build-fail
 //@[cpu] compile-flags: -Ctarget-cpu=gfx900
 //@[cpu] build-pass
@@ -15,3 +14,5 @@
 trait Sized {}
 
 pub fn foo() {}
+
+//[nocpu]~? ERROR target requires explicitly specifying a cpu with `-C target-cpu`

Diff for: tests/ui/instrument-xray/flags-always-never-1.rs

@@ -2,6 +2,7 @@
 //
 //@ needs-xray
 //@ compile-flags: -Z instrument-xray=always,never
-//@ error-pattern: incorrect value `always,never` for unstable option `instrument-xray`
 
 fn main() {}
+
+//~? ERROR incorrect value `always,never` for unstable option `instrument-xray`

Diff for: tests/ui/instrument-xray/flags-dupe-always.rs

@@ -2,6 +2,7 @@
 //
 //@ needs-xray
 //@ compile-flags: -Z instrument-xray=always,always
-//@ error-pattern: incorrect value `always,always` for unstable option `instrument-xray`
 
 fn main() {}
+
+//~? ERROR incorrect value `always,always` for unstable option `instrument-xray` 

Diff for: tests/ui/instrument-xray/flags-dupe-ignore-loops.rs

@@ -2,6 +2,7 @@
 //
 //@ needs-xray
 //@ compile-flags: -Z instrument-xray=ignore-loops,ignore-loops
-//@ error-pattern: incorrect value `ignore-loops,ignore-loops` for unstable option `instrument-xray`
 
 fn main() {}
+
+//~? ERROR incorrect value `ignore-loops,ignore-loops` for unstable option `instrument-xray`

Diff for: tests/ui/io-checks/non-ice-error-on-worker-io-fail.rs

@@ -16,8 +16,6 @@
 // rely on the checking of the normalized stderr output as our actual
 // "verification" of the diagnostic).
 
-//@ error-pattern: error
-
 // On Mac OS X, we get an error like the below
 //@ normalize-stderr: "failed to write bytecode to ./does-not-exist/output.non_ice_error_on_worker_io_fail.*" -> "io error modifying ./does-not-exist/"
 
@@ -29,3 +27,5 @@
 //@ ignore-arm - the file-system issues do not replicate here, at least on armhf-gnu
 
 #![crate_type = "lib"]
+
+//~? ERROR /does-not-exist/

Diff for: tests/ui/linkage-attr/raw-dylib/elf/multiple-libraries.rs

@@ -35,3 +35,5 @@ fn main() {
   meooooooooooooooow();
   woooooooooooooooooof();
 }
+
+//[without]~? ERROR linking with `

Diff for: tests/ui/linkage-attr/raw-dylib/elf/single-symbol.rs

@@ -26,3 +26,5 @@ unsafe extern "C" {
 fn main() {
   meooooooooooooooow();
 }
+
+//[without]~? ERROR linking with `

Diff for: tests/ui/linkage-attr/raw-dylib/elf/verbatim.rs

@@ -27,3 +27,5 @@ unsafe extern "C" {
 fn main() {
   meooooooooooooooow();
 }
+
+//[without]~? ERROR linking with `