travis: add nearly all gallium drivers to the list

Note: we need the explicit --enable-freedreno for libdrm since the
latter is 'smart' and disables it if building on !arm platforms.

The radeonsi and swr are explicitly left out since they require
'too-recent' LLVM - 3.6

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Andres Gomez <agomez@igalia.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
1 file changed