Modified the ArchSpec to take an optional "Platform *" when setting the triple.
This allows you to have a platform selected, then specify a triple using
"i386" and have the remaining triple items (vendor, os, and environment) set
automatically.

Many interpreter commands take the "--arch" option to specify an architecture
triple, so now the command options needed to be able to get to the current
platform, so the Options class now take a reference to the interpreter on
construction.

Modified the build LLVM building in the Xcode project to use the new
Xcode project level user definitions:

LLVM_BUILD_DIR - a path to the llvm build directory
LLVM_SOURCE_DIR - a path to the llvm sources for the llvm that will be used to build lldb
LLVM_CONFIGURATION - the configuration that lldb is built for (Release, 
Release+Asserts, Debug, Debug+Asserts).

I also changed the LLVM build to not check if "lldb/llvm" is a symlink and
then assume it is a real llvm build directory versus the unzipped llvm.zip
package, so now you can actually have a "lldb/llvm" directory in your lldb
sources.




git-svn-id: https://llvm.org/svn/llvm-project/llvdb/trunk@129112 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/Commands/CommandObjectTarget.cpp b/source/Commands/CommandObjectTarget.cpp
index 1780f2b..7686620 100644
--- a/source/Commands/CommandObjectTarget.cpp
+++ b/source/Commands/CommandObjectTarget.cpp
@@ -489,8 +489,8 @@
     class CommandOptions : public Options
     {
     public:
-        CommandOptions () :
-            Options(),
+        CommandOptions (CommandInterpreter &interpreter) :
+            Options(interpreter),
             m_line_start(0),
             m_line_end (UINT_MAX),
             m_func_name_type_mask (eFunctionNameTypeAuto),
@@ -634,7 +634,8 @@
         CommandObject (interpreter,
                        "target stop-hook add ",
                        "Add a hook to be executed when the target stops.",
-                       "target stop-hook add")
+                       "target stop-hook add"),
+        m_options (interpreter)
     {
     }