Add API control of the signal disposition.

See http://reviews.llvm.org/D4221 for details.

This commit allows you to control the signals that lldb will suppress, stop or forward using the Python and C++ APIs.

Change by Russell Harmon.

Xcode build system changes (and any mistakes) by Todd Fiala.  Tested on MacOSX 10.9.3 and Xcode 6 beta.  (Xcode 5 is hitting the dependency checker crasher on all my systems).

llvm-svn: 211526
diff --git a/lldb/scripts/Python/interface/SBProcess.i b/lldb/scripts/Python/interface/SBProcess.i
index d023b24..5cd99c0 100644
--- a/lldb/scripts/Python/interface/SBProcess.i
+++ b/lldb/scripts/Python/interface/SBProcess.i
@@ -240,6 +240,9 @@
     lldb::SBError
     Signal (int signal);
 
+    lldb::SBUnixSignals
+    GetUnixSignals();
+
     %feature("docstring", "
     Returns a stop id that will increase every time the process executes.  If
     include_expression_stops is true, then stops caused by expression evaluation