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Summary: In one of the 2 places the LC_BUILD_VERSION load command is handled, there is a bug preventing us from actually handling them (the address where to read the load command was not updated). This patch factors reading the deployment target load commands into a helper and adds testing for the 2 code paths calling the helper. The testing is a little bit complicated because the only times those load commands matter is when debugging a simulator process. I added a new decorator to check that a specific SDK is available. The actual testing was fairly easy once I knew how to run a simulated process. Reviewers: jasonmolenda, labath Subscribers: lldb-commits Differential Revision: https://reviews.llvm.org/D45298 llvm-svn: 329374