Add test for LinkModules warning on triple, modified by r203009. Datalayout is already tested.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203468 91177308-0d34-0410-b5e6-96231b3b80d8

Author: jfbastien

test/Linker/Inputs/targettriple-a.ll

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+target triple = "e"

test/Linker/Inputs/targettriple-b.ll

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+target triple = "E"

test/Linker/targettriple.ll

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+; RUN: llvm-link %s %S/Inputs/targettriple-a.ll -S -o - 2>%t.a.err | FileCheck %s
+; RUN: cat %t.a.err | not FileCheck %s 2>&1 | FileCheck --check-prefix=WARN-A %s
+
+; RUN: llvm-link %s %S/Inputs/targettriple-b.ll -S -o - 2>%t.b.err | FileCheck %s
+; RUN: cat %t.b.err | FileCheck --check-prefix=WARN-B %s
+
+target triple = "e"
+
+; CHECK: target triple = "e"
+
+; this is a hack to check that llvm-link printed no warnings.
+; WARN-A: FileCheck error: '-' is empty.
+
+; WARN-B: WARNING: Linking two modules of different target triples: