msvc2tasks.pl: Adapt to MSVC2015.

The format of the compiler warnings changed:
c:\foo.cpp(395) : warning C4800: 'BOOL' : forcing value to bool 'true' or 'false' (performance warning)
c:\foo.cpp(395): warning C4800: 'BOOL' : forcing value to bool 'true' or 'false' (performance warning)

Change-Id: Iaa04d8fedbb0a3da2802be1c860d54fefb7bfe5d
Reviewed-by: Tobias Hunger <tobias.hunger@theqtcompany.com>

scripts/msvc2tasks.pl

@@ -16,7 +16,7 @@ while (my $line = <STDIN> ) {
     chomp($line);
     # --- extract file name based matching:
     # c:\foo.cpp(395) : warning C4800: 'BOOL' : forcing value to bool 'true' or 'false' (performance warning)
-    if ($line =~ /^([^(]+)\((\d+)\) : warning (C\d+:.*)$/) {
+    if ($line =~ /^([^(]+)\((\d+)\) ?: warning (C\d+:.*)$/) {
         my $fileName = $1;
         my $lineNumber = $2;
         my $text = $3;