By Elizabeth Piper and Zohra Bensemra KYIV/BUZOVA, Ukraine (Reuters) – Russian forces pounded targets in eastern Ukraine with missiles and artillery on Sunday as Austria’s leader planned to meet with Russian President Vladimir Putin and Washington pledged to give Ukraine “the weapons it needs” to defend itself against a new Russian offensive. Austrian Chancellor Karl Nehammer said he would meet with Putin on Monday in Moscow for the Russian leader’s first face-to-face meeting with a European Union counterpart since Russia’s invasion began on Feb. 24. “We are militarily neutral, but (have) a cl…