Fix analyzer breakage introduced by r49213: http://llvm.org/viewvc/llvm-project?rev=49213&view=rev

The problem is that some clients of gcc lookout at the stdout output of gcc;
this requires that all the analyzer diagnostics go to stderr to avoid polluting
stdout.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@49355 91177308-0d34-0410-b5e6-96231b3b80d8

utils/ccc-analyzer

@@ -27,8 +27,10 @@ def quote(arg):
     return arg
 
 def run(args):
-    print ' '.join(map(quote, args))
-    print
+    # We MUST print to stderr.  Some clients use the stdout output of
+    # gcc for various purposes.
+    print >> sys.stderr, ' '.join(map(quote, args))
+    print >> sys.stderr
     code = subprocess.call(args)
     if code > 255:
         code = 1
@@ -40,6 +42,8 @@ def preprocess(args):
     run(command + args)
 
 def compile(args):
+  # We MUST print to stderr.  Some clients use the stdout output of
+  # gcc for various purposes.
   print >> sys.stderr, '\n'
   command = 'gcc'.split()
   run(command + args)
@@ -57,6 +61,8 @@ def analyze(args,language,output,files,verbose,htmldir):
     print_args = []
     
     if verbose:
+      # We MUST print to stderr.  Some clients use the stdout output of
+      # gcc for various purposes.
       print >> sys.stderr, ' '.join(['\n[LOCATION]:', os.getcwd(), '\n' ])
       i = 0
       while i < len(args):
@@ -77,7 +83,9 @@ def analyze(args,language,output,files,verbose,htmldir):
         args.append(htmldir)
         print_args.append(htmldir)
     
-    if verbose:  
+    if verbose: 
+      # We MUST print to stderr.  Some clients use the stdout output of
+      # gcc for various purposes. 
       print >> sys.stderr, ' '.join(command+print_args)
       print >> sys.stderr, '\n'