Update BuildTools, CoreClr, CoreFx, ProjectNTfs, ProjectNTfsTestILC to preview2-02515...
authordotnet-maestro-bot <dotnet-maestro-bot@microsoft.com>
Thu, 15 Feb 2018 19:25:39 +0000 (13:25 -0600)
committerAhson Khan <ahkha@microsoft.com>
Thu, 15 Feb 2018 19:25:39 +0000 (11:25 -0800)
commit820ff9d509f2bbfd57c0a3a6bf01d13c679eec23
tree99b66fb40ba7a11ff78d4c4b659de7c54909d341
parentb86bd61cfd6b65418c3ed3751fe5bf7ae726cffe
Update BuildTools, CoreClr, CoreFx, ProjectNTfs, ProjectNTfsTestILC to preview2-02515-01, preview2-26214-07, preview2-26215-04, beta-26215-00, beta-26215-00, respectively (dotnet/corefx#27112)

Commit migrated from https://github.com/dotnet/corefx/commit/42a3e4384f419322bb4ea32a63fda0ff75e3f29d
src/libraries/BuildToolsVersion.txt
src/libraries/dependencies.props
src/libraries/external/test-runtime/optional.json
tools-local/ILAsmVersion.txt