IWYU for llvm-config.h in llvm, additions.

See r331124 for how I made a list of files missing the include.
I then ran this Python script:

    for f in open('filelist.txt'):
        f = f.strip()
        fl = open(f).readlines()

        found = False
        for i in xrange(len(fl)):
            p = '#include "llvm/'
            if not fl[i].startswith(p):
                continue
            if fl[i][len(p):] > 'Config':
                fl.insert(i, '#include "llvm/Config/llvm-config.h"\n')
                found = True
                break
        if not found:
            print 'not found', f
        else:
            open(f, 'w').write(''.join(fl))

and then looked through everything with `svn diff | diffstat -l | xargs -n 1000 gvim -p`
and tried to fix include ordering and whatnot.

No intended behavior change.

llvm-svn: 331184
diff --git a/llvm/lib/Support/Unix/Memory.inc b/llvm/lib/Support/Unix/Memory.inc
index 848548d..cc5a43c 100644
--- a/llvm/lib/Support/Unix/Memory.inc
+++ b/llvm/lib/Support/Unix/Memory.inc
@@ -12,6 +12,7 @@
 //===----------------------------------------------------------------------===//
 
 #include "Unix.h"
+#include "llvm/Config/config.h"
 #include "llvm/Support/DataTypes.h"
 #include "llvm/Support/ErrorHandling.h"
 #include "llvm/Support/Process.h"
diff --git a/llvm/lib/Support/Unix/Process.inc b/llvm/lib/Support/Unix/Process.inc
index 3ce2212..68baab8 100644
--- a/llvm/lib/Support/Unix/Process.inc
+++ b/llvm/lib/Support/Unix/Process.inc
@@ -14,6 +14,7 @@
 #include "Unix.h"
 #include "llvm/ADT/Hashing.h"
 #include "llvm/ADT/StringRef.h"
+#include "llvm/Config/config.h"
 #include "llvm/Support/ManagedStatic.h"
 #include "llvm/Support/Mutex.h"
 #include "llvm/Support/MutexGuard.h"
diff --git a/llvm/lib/Support/Unix/Signals.inc b/llvm/lib/Support/Unix/Signals.inc
index a626b25..2c5d366 100644
--- a/llvm/lib/Support/Unix/Signals.inc
+++ b/llvm/lib/Support/Unix/Signals.inc
@@ -14,6 +14,7 @@
 
 #include "Unix.h"
 #include "llvm/ADT/STLExtras.h"
+#include "llvm/Config/config.h"
 #include "llvm/Demangle/Demangle.h"
 #include "llvm/Support/FileSystem.h"
 #include "llvm/Support/FileUtilities.h"
diff --git a/llvm/lib/Support/Unix/ThreadLocal.inc b/llvm/lib/Support/Unix/ThreadLocal.inc
index 31c3f38..a6564f0 100644
--- a/llvm/lib/Support/Unix/ThreadLocal.inc
+++ b/llvm/lib/Support/Unix/ThreadLocal.inc
@@ -16,6 +16,8 @@
 //===          is guaranteed to work on *all* UNIX variants.
 //===----------------------------------------------------------------------===//
 
+#include "llvm/Config/config.h"
+
 #if defined(HAVE_PTHREAD_H) && defined(HAVE_PTHREAD_GETSPECIFIC)
 
 #include <cassert>
diff --git a/llvm/lib/Support/Unix/Watchdog.inc b/llvm/lib/Support/Unix/Watchdog.inc
index 5d89c0e..f425339 100644
--- a/llvm/lib/Support/Unix/Watchdog.inc
+++ b/llvm/lib/Support/Unix/Watchdog.inc
@@ -11,6 +11,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "llvm/Config/config.h"
+
 #ifdef HAVE_UNISTD_H
 #include <unistd.h>
 #endif