Merge pull request swiftlang#1981 from bnbarham/remove-dsym-check

Update `testExecutableFallbackPath` to pass on all platforms

Author: bnbarham

Tests/SwiftDriverTests/SwiftDriverTests.swift

@@ -5693,15 +5693,10 @@ final class SwiftDriverTests: XCTestCase {
  }
 
  func testExecutableFallbackPath() throws {
- let driver1 = try Driver(args: ["swift", "main.swift"])
- if !driver1.targetTriple.isDarwin {
- XCTAssertThrowsError(try driver1.toolchain.getToolPath(.dsymutil))
- }
-
  var env = ProcessEnv.block
  env["SWIFT_DRIVER_TESTS_ENABLE_EXEC_PATH_FALLBACK"] = "1"
- let driver2 = try Driver(args: ["swift", "main.swift"], env: env)
- XCTAssertNoThrow(try driver2.toolchain.getToolPath(.dsymutil))
+ let driver = try Driver(args: ["swift", "main.swift"], env: env)
+ XCTAssertNoThrow(try driver.toolchain.getToolPath(.dsymutil))
  }
 
  func testVersionRequest() throws {