[analyzer] scan-build: handle --sysroot=/path in addition to --sysroot /path.

Current code assumes flags in CompilerLinkerOptionMap don't use =,
which isn't always true.

Patch by Chris Laplante!

Differential Revision: https://reviews.llvm.org/D66569

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@371002 91177308-0d34-0410-b5e6-96231b3b80d8

tools/scan-build/libexec/ccc-analyzer

@@ -498,7 +498,8 @@ my $HasSDK = 0;
 # Process the arguments.
 foreach (my $i = 0; $i < scalar(@ARGV); ++$i) {
   my $Arg = $ARGV[$i];
-  my ($ArgKey) = split /=/,$Arg,2;
+  my @ArgParts = split /=/,$Arg,2;
+  my $ArgKey = @ArgParts[0];
 
   # Be friendly to "" in the argument list.
   if (!defined($ArgKey)) {
@@ -566,10 +567,12 @@ foreach (my $i = 0; $i < scalar(@ARGV); ++$i) {
     push @CompileOpts,$Arg;
     push @LinkOpts,$Arg;
 
-    while ($Cnt > 0) {
-      ++$i; --$Cnt;
-      push @CompileOpts, $ARGV[$i];
-      push @LinkOpts, $ARGV[$i];
+    if (scalar @ArgParts == 1) {
+      while ($Cnt > 0) {
+        ++$i; --$Cnt;
+        push @CompileOpts, $ARGV[$i];
+        push @LinkOpts, $ARGV[$i];
+      }
     }
     next;
   }