Update version of third-party ext tarball

The only change in the tarball is that we have removed the libraries and
header files for ddboost. These have already been removed for centos for
some time.
Co-authored-by: NChris Hajas <chajas@pivotal.io>
Co-authored-by: NKaren Huddleston <khuddleston@pivotal.io>

gpAux/releng/make/dependencies/ivy.xml

@@ -18,7 +18,7 @@
       <dependency org="OpenSSL"         name="openssl"         rev="1.0.2l"         conf="rhel7_x86_64->rhel6_x86_64;rhel6_x86_64->rhel6_x86_64;suse11_x86_64->sles11_x86_64;sles11_x86_64->sles11_x86_64;aix7_ppc_64->aix7_ppc_64" />
       <dependency org="gnu"             name="libstdc"         rev="6.0.22"         conf="rhel7_x86_64->rhel6_x86_64;rhel6_x86_64->rhel6_x86_64;suse11_x86_64->suse11_x86_64;sles11_x86_64->suse11_x86_64" />
       <dependency org="third-party"     name="ext"             rev="1.1"            conf="win32->win32" />
-      <dependency org="third-party"     name="ext"             rev="gpdb5_ext-3.3"  conf="rhel7_x86_64->rhel6_x86_64;rhel6_x86_64->rhel6_x86_64;suse11_x86_64->sles11_x86_64;sles11_x86_64->sles11_x86_64" />
+      <dependency org="third-party"     name="ext"             rev="gpdb5_ext-3.4"  conf="rhel7_x86_64->rhel6_x86_64;rhel6_x86_64->rhel6_x86_64;suse11_x86_64->sles11_x86_64;sles11_x86_64->sles11_x86_64" />
       <dependency org="Hyperic"         name="sigar"           rev="1.6.5"          conf="rhel6_x86_64->rhel6_x86_64;rhel7_x86_64->rhel7_x86_64;suse11_x86_64->sles11_x86_64;sles11_x86_64->sles11_x86_64" />
       <dependency org="R-Project"       name="R"               rev="3.1.0"          conf="rhel7_x86_64->rhel6_x86_64;rhel6_x86_64->rhel6_x86_64;suse11_x86_64->suse10_x86_64;sles11_x86_64->suse10_x86_64" />
       <dependency org="Python"          name="python-gpdb5"    rev="2.7.12"         conf="rhel6_x86_64->rhel6_x86_64;rhel7_x86_64->rhel6_x86_64;suse11_x86_64->sles11_x86_64;sles11_x86_64->sles11_x86_64" />