Updating Makefile for threads-simple.
Updating Makefile for threads-simple.

mdk/mdk-code-snippets,mdk/mdk-code-snippets,mdk/mdk-code-snippets,mdk/mdk-code-snippets,mdk/mdk-code-snippets,mdk/mdk-code-snippets,mdk/mdk-code-snippets,mdk/mdk-code-snippets