scan-build: enable C++ support by default.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@137382 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/scan-build/ccc-analyzer b/tools/scan-build/ccc-analyzer
index 5697b21..383210f 100755
--- a/tools/scan-build/ccc-analyzer
+++ b/tools/scan-build/ccc-analyzer
@@ -380,14 +380,11 @@
 
 my %LangsAccepted = (
   "objective-c" => 1,
-  "c" => 1
+  "c" => 1,
+  "c++" => 1,
+  "objective-c++" => 1
 );
 
-if (defined $ENV{'CCC_ANALYZER_CPLUSPLUS'}) {
-  $LangsAccepted{"c++"} = 1;
-  $LangsAccepted{"objective-c++"} = 1;
-}
-
 ##----------------------------------------------------------------------------##
 #  Main Logic.
 ##----------------------------------------------------------------------------##