Merge pull request #40181 from Azoy/testing-unicode-scalar-props

[test][stdlib] Beef up Unicode.Scalar.Properties testing

Author: Azoy

stdlib/private/StdlibUnicodeUnittest/CMakeLists.txt

@@ -5,6 +5,7 @@ add_swift_target_library(swiftStdlibUnicodeUnittest ${SWIFT_STDLIB_LIBRARY_BUILD
   # filename.
   StdlibUnicodeUnittest.swift
   Collation.swift
+  UnicodeScalarProperties.swift
 
   SWIFT_MODULE_DEPENDS StdlibUnittest
   SWIFT_MODULE_DEPENDS_LINUX Glibc