test: Allow linking to the gyp build mips/arm release/debug build

test: Allow linking to the gyp build mips/arm release/debug build

SCons will be deprecated soon and the new gyp buildsystem allows to
build for MIPS/ARM debug/release at the same time in different build
directories. Add Makefile targets to link arm/mips test applications.
I plan to use them for nigthly builds on my public jenkins.

Change-Id: I16e7637e1066d1f27724ec3403bcc770cd190a61
Reviewed-by: Girish Ramakrishnan <girish.1.ramakrishnan@nokia.com>
Reviewed-by: Aaron Kennedy <aaron.kennedy@nokia.com>