Add host build for hamcrest-library.

This library contains useful functions in tests. Add a build target
for host side, so that they can be used in host side tests.

Test: m hamcrest-library-host -j12
Bug: None
Change-Id: I93d82f44b2e4bb0bf5ab5057d03fe063f637fea3
Merged-In: I93d82f44b2e4bb0bf5ab5057d03fe063f637fea3
(cherry picked from commit 3408e0e6)