Abi: Choose word width of 32b for x86 target-triplets

Signed-off-by: Martin Kampas <martin.kampas@jolla.com>
MerTarget: Do not need tool chain for debugger creation

Tool chain is not yet available at the time this is called.

Fixes dabab8a (Merge branch 'mer-3.1' into next)

Signed-off-by: Martin Kampas <martin.kampas@jolla.com>