Introduce LLVMWriteBitcodeToMemoryBuffer C API function.

llvm-svn: 219643
diff --git a/llvm/include/llvm-c/BitWriter.h b/llvm/include/llvm-c/BitWriter.h
index 0ec8e75..f25ad3a 100644
--- a/llvm/include/llvm-c/BitWriter.h
+++ b/llvm/include/llvm-c/BitWriter.h
@@ -45,6 +45,9 @@
     descriptor. Returns 0 on success. Closes the Handle. */
 int LLVMWriteBitcodeToFileHandle(LLVMModuleRef M, int Handle);
 
+/** Writes a module to a new memory buffer and returns it. */
+LLVMMemoryBufferRef LLVMWriteBitcodeToMemoryBuffer(LLVMModuleRef M);
+
 /**
  * @}
  */