[analyzer] Control C++ inlining with a macro in ExprEngineCallAndReturn.cpp.
[analyzer] Control C++ inlining with a macro in ExprEngineCallAndReturn.cpp.

For now this will stay on, but this way it's easy to switch off if we need
to pull back our support for a while.

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@161064 91177308-0d34-0410-b5e6-96231b3b80d8

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