Fixed a ton of gcc compile warnings

Removed some unused variables, added some consts, changed some casts
to const_cast. I don't think any of these changes are very
controversial.

Differential Revision: http://reviews.llvm.org/D9674

llvm-svn: 237218
diff --git a/lldb/source/Plugins/Process/Linux/ProcessLinux.cpp b/lldb/source/Plugins/Process/Linux/ProcessLinux.cpp
index cb987ac..303f1e2 100644
--- a/lldb/source/Plugins/Process/Linux/ProcessLinux.cpp
+++ b/lldb/source/Plugins/Process/Linux/ProcessLinux.cpp
@@ -49,7 +49,7 @@
 ProcessSP
 ProcessLinux::CreateInstance(Target &target, Listener &listener, const FileSpec *core_file)
 {
-    return ProcessSP(new ProcessLinux(target, listener, (FileSpec *)core_file));
+    return ProcessSP(new ProcessLinux(target, listener, core_file));
 }
 
 void
@@ -68,7 +68,7 @@
 //------------------------------------------------------------------------------
 // Constructors and destructors.
 
-ProcessLinux::ProcessLinux(Target& target, Listener &listener, FileSpec *core_file)
+ProcessLinux::ProcessLinux(Target& target, Listener &listener, const FileSpec *core_file)
     : ProcessPOSIX(target, listener, GetStaticLinuxSignalsSP ()), m_core_file(core_file), m_stopping_threads(false)
 {
 #if 0