Explictily specify the dynamic linker name.

Change-Id: Ie456f19cbe3dc8e3a9677638cc705b6eaf77c2b4

Conflicts:
	core/combo/TARGET_linux-aarch64.mk
Revert "use isl 0.12.1 by default"

This reverts commit 100690eb42f81b4833c07af2949cd19141afee3c.
Revert "linux-arm: disable tree vectorization when neon fpu is used"

This reverts commit 2201c2005e5959b4a9113e29dd67f68584532fc5.
Revert "Couple more build flags"

This reverts commit 6db25ecd6bf6cd37de4ebf14110172d5df946214.