Initialize with the right capacity in CloneCustomMetadata (#5218)
Initialize with the right capacity in CloneCustomMetadata (#5218)

To avoid resizing after creation.
AndyGerlicher/msbuild,AndyGerlicher/msbuild,sean-gilliam/msbuild,rainersigwald/msbuild,mono/msbuild,AndyGerlicher/msbuild,cdmihai/msbuild,rainersigwald/msbuild,mono/msbuild,AndyGerlicher/msbuild,sean-gilliam/msbuild,mono/msbuild,sean-gilliam/msbuild,rainersigwald/msbuild,cdmihai/msbuild,cdmihai/msbuild,sean-gilliam/msbuild,cdmihai/msbuild,mono/msbuild,rainersigwald/msbuild