autotools: library-dependency when no sse and 32-bit

autotools: library-dependency when no sse and 32-bit

Building of 32bit Mesa may fail if __SSE__ is not specified.
Added missed dependency from libm.

v2: avoided dependecy on any flag, just link

v3: meson doesn't fail, but have added dependency on libm

CC: Dylan Baker <dylan@pnwbakers.com>
CC: Lionel G Landwerlin <lionel.g.landwerlin@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108560
Signed-off-by: Sergii Romantsov <sergii.romantsov@globallogic.com>
Reviewed-by: Dylan Baker <dylan@pnwbakers.com>