Merge two lines into one for V8_TARGET_ARCH_${arch} and V8_HOST_ARCH_${arch}

R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/18575003

Patch from Haitao Feng <haitao.feng@intel.com>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15500 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Set GVN ChangesNewSpacePromotion for OSR Entry.

BUG=
R=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/18752002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15501 ce2b1a6d-e550-0410-aec6-3dcde31c8c00