Fix scan-build's processing of clang's analysis arguments. Patch by Nikita Zhuk!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@58093 91177308-0d34-0410-b5e6-96231b3b80d8

utils/scan-build

@@ -98,7 +98,7 @@ my $FoundAnalysis = 0;
 
 while(<PIPE>) {
   if ($FoundAnalysis == 0) {
-    if (/Available Source Code Analyses/) {
+    if (/SCA Checks\/Analyses/) {
       $FoundAnalysis = 1;
     }