mapi: automake: set VISIBILITY_CFLAGS for shared glapi
shared glapi was previously built without setting CFLAGS for
AM_CFLAGS and VISIBILITY_CFLAGS.
This resulted in symbols being exported that shouldn't be.
The x86 and sparc assembly versions of the dispatch table partially
mitigated this by using .hidden. Otherwise shared_dispatch_stub_*
were being exported.
Signed-off-by: Jonathan Gray <jsg@jsg.id.au>
Cc: "11.2 12.0 13.0" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>