[build-script] Add module ABI name prefix to swift-syntax libraries

Add 'Compiler' prefix to ABI names of swift-syntax libraries so that
compiler libraries (e.g. sourcekitdInProc) can be used from binaries
linking with swift-syntax (e.g. via SwiftPM)

#68812
rdar://116951101

Author: rintaro

utils/build-windows-toolchain.bat

@@ -214,6 +214,8 @@ cmake ^
 
   -D CMAKE_INSTALL_PREFIX="%InstallRoot%" ^
 
+  -D SWIFT_MODULE_ABI_NAME_PREFIX="Compiler" ^
+
   -G Ninja ^
   -S %SourceRoot%\swift-syntax || (exit /b)
 cmake --build %BuildRoot%\99 || (exit /b)

utils/swift_build_support/swift_build_support/products/earlyswiftsyntax.py

@@ -63,6 +63,7 @@ def build(self, host_target):
         self.cmake_options.define('CMAKE_INSTALL_PREFIX:PATH', self.args.install_prefix)
         self.cmake_options.define('SWIFTSYNTAX_ENABLE_ASSERTIONS:BOOL',
                                   self.args.assertions)
+        self.cmake_options.define('SWIFT_MODULE_ABI_NAME_PREFIX:STRING', 'Compiler')
         self.build_with_cmake(["all"], self.args.swift_build_variant, [])
 
     def should_test(self, host_target):