Revert "[Android] Workaround for aarch64 NDK bug."

Not required anymore after crrev.com/555503006
This reverts commit df01991e.

BUG=407545
TBR=anton@chromium.org

Review URL: https://codereview.chromium.org/576123002

Cr-Commit-Position: refs/heads/master@{#295272}

build/common.gypi

@@ -3956,12 +3956,6 @@
                     'cflags!': [
                        '-fstack-protector',  # stack protector is always enabled on arm64.
                     ],
-                    # This is a workaround for a NDK bug (b/15574841) and
-                    # should be removed by the r10c-rc3 NDK roll.
-                    # Ping primiano@ if you see this after Oct 2014.
-                    'ldflags': [
-                       '-Wl,--dynamic-linker=/system/bin/linker64',
-                    ],
                   }],
                 ],
               }],