Update clang to r339409.

Change-Id: I800772d2d838223be1f6b40d490c4591b937fca2
diff --git a/linux-x64/clang/include/llvm/BinaryFormat/WasmRelocs.def b/linux-x64/clang/include/llvm/BinaryFormat/WasmRelocs.def
index d6f0e42..8ffd51e 100644
--- a/linux-x64/clang/include/llvm/BinaryFormat/WasmRelocs.def
+++ b/linux-x64/clang/include/llvm/BinaryFormat/WasmRelocs.def
@@ -11,3 +11,5 @@
 WASM_RELOC(R_WEBASSEMBLY_MEMORY_ADDR_I32,      5)
 WASM_RELOC(R_WEBASSEMBLY_TYPE_INDEX_LEB,       6)
 WASM_RELOC(R_WEBASSEMBLY_GLOBAL_INDEX_LEB,     7)
+WASM_RELOC(R_WEBASSEMBLY_FUNCTION_OFFSET_I32,  8)
+WASM_RELOC(R_WEBASSEMBLY_SECTION_OFFSET_I32,   9)