Add a swift test.

Author: jimingham

lldb/test/API/commands/target/modules/swift/Makefile

@@ -0,0 +1,4 @@
+SWIFT_SOURCES := main.swift
+SWIFTFLAGS_EXTRAS := -O
+
+include Makefile.rules

lldb/test/API/commands/target/modules/swift/TestSwiftImageLookupPC.py

@@ -0,0 +1,19 @@
+import lldb
+from lldbsuite.test.lldbtest import *
+from lldbsuite.test.decorators import *
+import lldbsuite.test.lldbutil as lldbutil
+import unittest2
+
+
+class SwiftAddressExpressionTest(TestBase):
+    @swiftTest
+    def test(self):
+        """Test that you can use register names in image lookup in a swift frame."""
+        self.build()
+        (target, process, thread, breakpoint) = lldbutil.run_to_source_breakpoint(self, 
+                "break here to check image lookup", lldb.SBFileSpec("main.swift"))
+        # I don't want to be too specific in what we print for image lookup,
+        # we're testing that the address expression for the pc worked.
+        self.expect("image lookup -va $pc", substrs=["doSomething"])
+        self.expect("image lookup -va $pc+4", substrs=["doSomething"])
+        

lldb/test/API/commands/target/modules/swift/main.swift

@@ -0,0 +1,7 @@
+func doSomething() {
+  print("break here to check image lookup");
+  print("I need another line of code here");
+}
+
+doSomething()
+