Mega-patch: ripped SourceManager out of Diagnostic/DiagnosticClient.  Now
SourceManager is passed by reference, allowing the SourceManager to be
associated with a specific translation unit, and not the entire execution
of the driver.

Modified all users of Diagnostics to comply with this new interface.

Integrated SourceManager as a member variable of TargetInfo. TargetInfo will
eventually be associated with a single translation unit (just like
SourceManager).

Made the SourceManager reference in ASTContext private. Provided accessor
getSourceManager() for clients to use instead. Modified clients to comply with
new interface.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@44878 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Driver/TextDiagnosticBuffer.cpp b/Driver/TextDiagnosticBuffer.cpp
index d0e2f90..c77801b 100644
--- a/Driver/TextDiagnosticBuffer.cpp
+++ b/Driver/TextDiagnosticBuffer.cpp
@@ -21,6 +21,7 @@
                                             Diagnostic::Level Level,
                                             SourceLocation Pos,
                                             diag::kind ID,
+                                            SourceManager& SrcMgr,
                                             const std::string *Strs,
                                             unsigned NumStrs,
                                             const SourceRange *,