buildroot

toolchain-configs.csv: re-organize for test-pkg

This commit reorganizes the toolchain-configs.csv so that the first
toolchains are a subset of "useful" toolchains to be tested by
contributors to validate a package. This subset is the one that will
be used by default by test-pkg.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>