build: enable ASLR (PIE) on OS X

After conducting several benchmarks, I noticed performance losses of
5-10%. As OS X is not a performance critical platform, as already
mentioned by @bnoordhuis, I have removed the -no_pie flag at least for
this platform. I'd love to enable PIE for other platforms if the 5-10%
speed loss is not too high. I would be happy to hear your opinion on
this.

Refs: #33425

PR-URL: #35704
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Richard Lau <[email protected]>
Reviewed-By: David Carlier <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Matteo Collina <[email protected]>

common.gypi

@@ -495,8 +495,7 @@
           ['_type!="static_library"', {
             'xcode_settings': {
               'OTHER_LDFLAGS': [
-                '-Wl,-no_pie',
-                '-Wl,-search_paths_first',
+                '-Wl,-search_paths_first'
               ],
             },
           }],