Add explicit triple to fix errors from #110102

Attempted fix for errors observed on:
https://luci-milo.appspot.com/ui/p/fuchsia/builders/toolchain.ci/clang-windows-x64/b8724497761651154417/overview

Several tests that required an explicit triple had none present; this
patch adds those triples.

Author: SLTozer

clang/test/CodeGen/extend-variable-liveness.c

@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 %s -emit-llvm -fextend-variable-liveness -o - | FileCheck %s --implicit-check-not=llvm.fake.use
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-llvm -fextend-variable-liveness -o - | FileCheck %s --implicit-check-not=llvm.fake.use
 // Check that fake use calls are emitted at the correct locations, i.e.
 // at the end of lexical blocks and at the end of the function.
 

clang/test/CodeGen/fake-use-determinism.c

@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -emit-llvm -fextend-variable-liveness %s -o - | FileCheck %s
+// RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -emit-llvm -fextend-variable-liveness %s -o - | FileCheck %s
 //
 // We are checking that the fake.use calls for i, j and k appear
 // in a particular order. It is not the order itself that is important

clang/test/CodeGen/fake-use-noreturn.cpp

@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 %s -emit-llvm -fextend-variable-liveness -o - | FileCheck %s
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-llvm -fextend-variable-liveness -o - | FileCheck %s
 //
 // Check we can correctly produce fake uses for function-level variables even
 // when we have a return in a nested conditional and there is no code at the end

clang/test/CodeGen/fake-use-this.cpp

@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 %s -emit-llvm -fextend-variable-liveness=this -o - | FileCheck %s --implicit-check-not=fake.use
+// RUN: %clang_cc1 %s -triple x86_64-unknown-linux-gnu -emit-llvm -fextend-variable-liveness=this -o - | FileCheck %s --implicit-check-not=fake.use
 // Check that we generate a fake_use call with the 'this' pointer as argument,
 // and no other fake uses.
 // The call should appear after the call to bar().