SIL: Lower lifetime dependencies when lowering function types.

Map the lifetime dependencies described in terms of the formal AST-level parameters
to the correct parameter(s) in the lowered SIL function type. There can be 0, 1,
or many SIL parameters per formal parameter because of tuple exploding. Also,
record which dependencies are on addressable parameters (meaning that the dependency
includes not only the value of the parameter, but its specific memory location).

lib/Serialization/ModuleFormat.h

@@ -2284,6 +2284,7 @@ namespace decls_block {
                      BCFixed<1>,         // isImmortal
                      BCFixed<1>,         // hasInheritLifetimeParamIndices
                      BCFixed<1>,         // hasScopeLifetimeParamIndices
+                     BCFixed<1>,         // hasAddressableParamIndices
                      BCArray<BCFixed<1>> // concatenated param indices
                      >;