Partially revert r335236

Jim pointed out that XCode has build configurations that build without
python and removing the ifdefs around the python code breaks them.

This reverts the #ifdef part of the above patch, while keeping the cmake
parts.

llvm-svn: 335260

lldb/source/Plugins/ScriptInterpreter/Python/PythonExceptionState.cpp

@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+#ifndef LLDB_DISABLE_PYTHON
+
 // LLDB Python header must be included first
 #include "lldb-python.h"
 
@@ -164,3 +166,5 @@ std::string PythonExceptionState::ReadBacktrace() const {
 
   return retval;
 }
+
+#endif