remove pointless path trimming

there is no reason why there should be unexpected leading or trailing
whitespace in an extra compiler's .depends list.

Change-Id: I46be75063180131e135fc6eea0238a482073618a
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>

qmake/generators/win32/msvc_objectmodel.cpp

@@ -2347,7 +2347,7 @@ bool VCFilter::addExtraCompiler(const VCFilterFile &info)
             deps[i] = Option::fixPathToTargetOS(
                         Project->replaceExtraCompilerVariables(
                                 deps.at(i), inFile, out, MakefileGenerator::NoShell),
-                        false).trimmed();
+                        false);
         // Command for file
         if (combined) {
             // Add dependencies for each file