don't detect readlink a-priori

it's pointless and causes an unnecessary delay.
what's worse, we wouldn't actually know whether we found a compatible
(gnu) readlink, so the fallback would never get activated. this would be
the case on macos (the problem wasn't noticed so far, because on macos
we build a bundle which doesn't need the wrapper in the first place).

Change-Id: Ibf4c370d5d9e25064e80faeaf12eb5fa1bc68c20
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

bin/qtcreator.sh

@@ -19,13 +19,12 @@ makeAbsolute() {
 
 me=`which "$0"` # Search $PATH if necessary
 if test -L "$me"; then
-    # Try readlink(1)
-    readlink=`type readlink 2>/dev/null` || readlink=
-    if test -n "$readlink"; then
-        # We have readlink(1), so we can use it. Assuming GNU readlink (for -f).
-        me=`readlink -nf "$me"`
+    # Try GNU readlink(1)
+    nme=`readlink -nf "$me" 2>/dev/null`
+    if test -n "$nme"; then
+        me=$nme
     else
-        # No readlink(1), so let's try ls -l
+        # No GNU readlink(1), so let's try ls -l
         base=`dirname "$me"`
         me=`ls -l "$me" | sed 's/^.*-> //'`
         me=`makeAbsolute "$me" "$base"`