AMDGPU: [AMDGPU] Assembler: add .hsa_code_object_metadata directive for functime metadata V2.0

Summary:
Added pair of directives .hsa_code_object_metadata/.end_hsa_code_object_metadata.
Between them user can put YAML string that would be directly put to the generated note. E.g.:
'''
.hsa_code_object_metadata
    {
        amd.MDVersion: [ 2, 0 ]
    }
.end_hsa_code_object_metadata
'''
Based on D25046

Reviewers: vpykhtin, nhaustov, yaxunl, tstellarAMD

Subscribers: arsenm, kzhuravl, wdng, nhaehnle, mgorny, tony-tye

Differential Revision: https://reviews.llvm.org/D27619

llvm-svn: 290097
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp b/llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
index 5402298..a8e6902 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
@@ -119,7 +119,7 @@
                                     "AMD", "AMDGPU");
 
   // Emit runtime metadata.
-  TS->emitRuntimeMetadata(M);
+  TS->EmitRuntimeMetadata(M);
 }
 
 bool AMDGPUAsmPrinter::isBlockOnlyReachableByFallthrough(