[NFC][SPIRV] Add test: call hidden function declaration

Author: jmmartinez

llvm/test/CodeGen/SPIRV/linkage/link-hidden.ll

@@ -0,0 +1,11 @@
+; RUN: not llc -verify-machineinstrs -O0 -mtriple=spirv-unknown-unknown %s -o - 2>&1 | FileCheck %s
+; CHECK: LLVM ERROR: Unknown function in:
+; CHECK-SAME: OpFunctionCall %{{[0-9]+}}:type, @bar
+
+define hidden spir_kernel void @foo() addrspace(4) {
+entry:
+  call spir_func addrspace(4) void @bar()
+  ret void
+}
+
+declare hidden spir_func void @bar() addrspace(4)