introduce compileTest function

this cuts down the enormous duplication of identical command line args
passed to compile.test.
this necessitates the addition of a -config parameter to compile.test,
as QMAKE_CONFIG needs to be extended in some cases.

Change-Id: I677b2fea4a407b9e4395e70a25e4e349efb0a946
Reviewed-by: Joerg Bornemann <joerg.bornemann@nokia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

config.tests/unix/compile.test

@@ -19,6 +19,10 @@ MAC_ARCH_LFLAGS=""
 while [ "$#" -gt 0 ]; do
     PARAM=$1
     case $PARAM in
+    -config)
+        QMAKE_CONFIG="$QMAKE_CONFIG $2"
+        shift
+        ;;
     -framework)
         LFLAGS="$LFLAGS -framework \"$2\""
         shift