add a couple more missing C api, patch by Vitaly Lugovskiy!

llvm-svn: 135151
diff --git a/llvm/include/llvm-c/Core.h b/llvm/include/llvm-c/Core.h
index e3dce58..fc33ab7 100644
--- a/llvm/include/llvm-c/Core.h
+++ b/llvm/include/llvm-c/Core.h
@@ -394,6 +394,9 @@
 unsigned LLVMCountStructElementTypes(LLVMTypeRef StructTy);
 void LLVMGetStructElementTypes(LLVMTypeRef StructTy, LLVMTypeRef *Dest);
 LLVMBool LLVMIsPackedStruct(LLVMTypeRef StructTy);
+LLVMBool LLVMIsOpaqueStruct(LLVMTypeRef StructTy);
+
+LLVMTypeRef LLVMGetTypeByName(LLVMModuleRef M, const char *Name);
 
 /* Operations on array, pointer, and vector types (sequence types) */
 LLVMTypeRef LLVMArrayType(LLVMTypeRef ElementType, unsigned ElementCount);