[Frontend] allow -emit-symbol-graph-dir and -supplementary-output-file-map at the same time #36500
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Resolves rdar://75155133
When the
-emit-symbol-graph[-dir]
flags were added, they were not completely integrated into the supplementary output file map structure. If a symbol graph is requested, these flags are passed to the frontend regardless of whether other supplementary outputs are collected into a file map. Because the frontend treats-emit-symbol-graph-dir
and-supplementary-output-file-map
as incompatible, this creates a situation where an error is reported through no fault of the user. This PR removes the check to disallow-emit-symbol-graph-dir
, since this information is not being emitted in the file map right now.A future PR will properly integrate
-emit-symbol-graph-dir
into the supplementary file map in the swift driver; this is meant as a stopgap for the meantime.