Skip more tests on Windows, and fix SourceKitLSPAPITests.SourceKitLSPAPITests.testLoadPackage to have windows path

Author: bkhouri

Tests/SourceKitLSPAPITests/SourceKitLSPAPITests.swift

@@ -318,7 +318,7 @@ final class SourceKitLSPAPITests: XCTestCase {
                     "-package-name", "pkg",
                     "-emit-dependencies",
                     "-emit-module",
-                    "-emit-module-path", "/path/to/build/\(destinationBuildParameters.triple)/debug/Modules/lib.swiftmodule"
+                    "-emit-module-path", "/path/to/build/\(destinationBuildParameters.triple)/debug/Modules/lib.swiftmodule".fixwin
                 ],
                 isPartOfRootPackage: true
             )
@@ -402,3 +402,13 @@ extension SourceKitLSPAPI.BuildDescription {
         return result
     }
 }
+
+extension String {
+    var fixwin: String {
+        #if os(Windows)
+        return self.replacingOccurrences(of: "/", with: "\\")
+        #else
+        return self
+        #endif
+    }
+}