build-script: Build foundation tests without debug info to workaround a linker crash

On amazon-linux2 the gold linker (version 1.14) crashes when linking debug info.
rdar://137760869

Author: eeckstein

utils/swift_build_support/swift_build_support/products/swiftfoundationtests.py

@@ -73,6 +73,13 @@ def test(self, host_target):
         ]
         if self.args.verbose_build:
             cmd.append('--verbose')
+
+        # On amazon-linux2 the gold linker (version 1.14) crashes when linking
+        # debug info. Workaround this issue by building without debug info.
+        # rdar://137760869
+        if host_target.startswith('linux'):
+            cmd += ['-Xswiftc', '-gnone']
+
         shell.call(cmd, env={'SWIFTCI_USE_LOCAL_DEPS': '1'})
 
     @classmethod