AMDGPU: Mark all unspecified CC functions in tests as amdgpu_kernel

Currently the default C calling convention functions are treated
the same as compute kernels. Make this explicit so the default
calling convention can be changed to a non-kernel.

Converted with perl -pi -e 's/define void/define amdgpu_kernel void/'
on the relevant test directories (and undoing in one place that actually
wanted a non-kernel).

llvm-svn: 298444
diff --git a/llvm/test/CodeGen/AMDGPU/hsa-group-segment.ll b/llvm/test/CodeGen/AMDGPU/hsa-group-segment.ll
index 1999dc3..6007938 100644
--- a/llvm/test/CodeGen/AMDGPU/hsa-group-segment.ll
+++ b/llvm/test/CodeGen/AMDGPU/hsa-group-segment.ll
@@ -3,7 +3,7 @@
 @internal_group = internal addrspace(3) global i32 undef
 @external_group = addrspace(3) global i32 undef
 
-define void @test() {
+define amdgpu_kernel void @test() {
 entry:
   store i32 0, i32 addrspace(3)* @internal_group
   store i32 0, i32 addrspace(3)* @external_group