First public build of Swift 5.1

linux-tests-python-3.patch

@@ -0,0 +1,35 @@
+--- swift-integration-tests/test-snapshot-binaries/linux_load_commands.py.orig	2019-07-22 18:29:09.865242157 -0500
++++ swift-integration-tests/test-snapshot-binaries/linux_load_commands.py	2019-07-22 18:29:36.655204752 -0500
+@@ -85,12 +85,12 @@
+     numberOfLinesSeen = 0
+ 
+     print("Visiting lib: {}".format(lib))
+-    lines = list(reversed(subprocess.check_output([args.read_elf, "-program-headers", lib]).split("\n")[:-1]))
++    lines = list(reversed(subprocess.check_output([args.read_elf, "-program-headers", lib]).split(b"\n")[:-1]))
+     p = ParseState()
+ 
+     # Until we finish parsing or run out of lines to parse...
+     while len(lines) > 0:
+-        l = lines.pop()
++        l = lines.pop().decode("utf-8")
+         print("DUMP: '{}'".format(l))
+         assert(p is not None)
+         curState = p
+@@ -143,7 +143,7 @@
+         "-iname",
+         "*.so"
+     ]
+-    return subprocess.check_output(cmd).split("\n")[:-1]
++    return subprocess.check_output(cmd).split(b"\n")[:-1]
+ 
+ def main():
+     parser = argparse.ArgumentParser()
+@@ -154,7 +154,7 @@
+ 
+     libraries = get_libraries(args.package_path)
+     for l in libraries:
+-          process_library(args, l)
++          process_library(args, l.decode("utf-8"))
+     sys.exit(0)
+ 
+ if __name__ == "__main__":