Android: also adb pull /system/bin/linker

This is so that gdb can find the address of rtld_db_dlactivity
 to enable breakpoints pending on shared libraries to be set.

Several fixes were needed so this can be used both in Jellybean
 as well as older versions of Android. Credit for these
 improvements goes to Ryan Bissell:

  https://android-review.googlesource.com/#/c/39180/
  https://android-review.googlesource.com/#/c/42611/
  https://android-review.googlesource.com/#/c/42612/

Change-Id: Ibfb6335ab256df58b407e1661e1f04070fc3ecb6
Reviewed-by: BogDan Vatra <bogdan@kde.org>
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/plugins/android/androiddeploystep.cpp

@@ -311,6 +311,10 @@ bool AndroidDeployStep::deployPackage()
                QStringList() << QLatin1String("-s") << m_deviceSerialNumber
                << QLatin1String("pull") << QLatin1String("/system/bin/app_process")
                << QString::fromLatin1("%1/app_process").arg(m_buildDirectory));
+    runCommand(deployProc, AndroidConfigurations::instance().adbToolPath().toString(),
+               QStringList() << QLatin1String("-s") << m_deviceSerialNumber << QLatin1String("pull")
+               << QLatin1String("/system/bin/linker")
+               << QString::fromLatin1("%1/linker").arg(m_buildDirectory));
     runCommand(deployProc, AndroidConfigurations::instance().adbToolPath().toString(),
                QStringList() << QLatin1String("-s") << m_deviceSerialNumber << QLatin1String("pull")
                << QLatin1String("/system/lib/libc.so")