Fix to set libtool special mode-args as a compiler flag

Signed-off-by: OBATA Akio <obache@wizdas.com>
(cherry picked from commit 141af55cca)

qmake/generators/unix/unixmake.cpp

@@ -343,7 +343,7 @@ UnixMakefileGenerator::init()
 		if(libtoolify[i].startsWith("QMAKE_LINK") || libtoolify[i] == "QMAKE_AR_CMD") {
 		    libtool_flags += " --mode=link";
 		    if(project->isActiveConfig("staticlib")) {
-			libtool_flags += " -static";
+			comp_flags += " -static";
 		    } else {
 			if(!project->isEmpty("QMAKE_LIB_FLAG")) {
 			    int maj = project->first("VER_MAJ").toInt();
@@ -363,7 +363,7 @@ UnixMakefileGenerator::init()
 			}
 		    }
 		    if(project->isActiveConfig("plugin"))
-			libtool_flags += " -module";
+			comp_flags += " -module";
 		} else {
 		    libtool_flags += " --mode=compile";
 		}