Add cross compile toolchain support to Benchmarks, and fix the python lint issue in skstresstester.py

Author: shahmishal

utils/swift_build_support/swift_build_support/products/benchmarks.py

@@ -82,7 +82,9 @@ def get_dependencies(cls):
 
 
 def run_build_script_helper(host_target, product, args):
-    toolchain_path = args.install_destdir
+    toolchain_path = swiftpm.SwiftPM.get_install_destdir(args,
+                                                         host_target,
+                                                         product.build_dir)
     if platform.system() == 'Darwin':
         # The prefix is an absolute path, so concatenate without os.path.
         toolchain_path += \

utils/swift_build_support/swift_build_support/products/skstresstester.py

@@ -96,7 +96,9 @@ def should_install(self, host_target):
         return self.args.install_skstresstester
 
     def install(self, host_target):
-        install_destdir = swiftpm.SwiftPM.get_install_destdir(self.args, host_target, self.build_dir)
+        install_destdir = swiftpm.SwiftPM.get_install_destdir(self.args,
+                                                              host_target,
+                                                              self.build_dir)
         install_prefix = install_destdir + self.args.install_prefix
         self.run_build_script_helper('install', host_target, [
             '--prefix', install_prefix