engine.pl: Fix i18n -o option in msvc buildsystem generator

The i18n 5e9637c (i18n: add infrastructure for translating
Git with gettext, 2011-11-18) introduced an extra '-o' option
into the make file.

If the msvc buildsystem is run without NO_GETTEXT being set
then this broke the engine.pl code for extracting the git.sln
for msvc gui-IDE. The setting of NO_GETTEXT was not fixed until
later, relative to the Msysgit project where this issue was being
investigated.

The presence of these options in the Makefile output should not
compromise the derived build structure. They should be ignored.

Add tests to remove these non linker options, in same vein as
74cf9bd (engine.pl: Fix a recent breakage of the buildsystem
generator, 2010-01-22).

Signed-off-by: Philip Oakley <philipoakley@iee.org>

contrib/buildsystems/engine.pl

@@ -141,6 +141,12 @@ sub parseMakeOutput
             next;
         }
 
+        if ($text =~ /^(mkdir|msgfmt) /) {
+            # options to the Portable Object translations
+            # the line "mkdir ... && msgfmt ..." contains no linker options
+            next;
+        }
+
         if($text =~ / -c /) {
             # compilation
             handleCompileLine($text, $line);