Allow the use of DT_RUNPATH.  This fixes a bug whereby libQt5WebEngineCore.so
ends up having an empty RUNPATH.

--- qt-everywhere-opensource-src-5.4.1/qtwebengine/src/3rdparty/chromium/build/common.gypi	2015-04-14 10:21:09.330925545 +0200
+++ qt-everywhere-opensource-src-5.4.1/qtwebengine/src/3rdparty/chromium/build/common.gypi	2015-04-14 10:21:38.735106097 +0200
@@ -4142,19 +4142,6 @@
               '-B<!(cd <(DEPTH) && pwd -P)/<(binutils_dir)',
             ],
           }],
-          # Some binutils 2.23 releases may or may not have new dtags enabled,
-          # but they are all compatible with --disable-new-dtags,
-          # because the new dynamic tags are not created by default.
-          ['binutils_version>=223', {
-            # Newer binutils don't set DT_RPATH unless you disable "new" dtags
-            # and the new DT_RUNPATH doesn't work without --no-as-needed flag.
-            # FIXME(mithro): Figure out the --as-needed/--no-as-needed flags
-            # inside this file to allow usage of --no-as-needed and removal of
-            # this flag.
-            'ldflags': [
-              '-Wl,--disable-new-dtags',
-            ],
-          }]
         ],
       },
     }],