meson: Set include dirs for asm

v2: - split this from the next patch
    - Only include x86-64 and not x86 when buiding x86_64

Signed-off-by: Dylan Baker <dylan.c.baker@intel.com>
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>

src/mesa/meson.build

     capture : true,
   )
 endif
+
+inc_libmesa_asm = []
 if with_asm_arch == 'x86'
   files_libmesa_common += files(
     'x86/assyntax.h',
     'x86/sse_normal.S',
     'x86/read_rgba_span_x86.S',
   )
+  inc_libmesa_asm = include_directories('x86')
 elif with_asm_arch == 'x86_64'
   files_libmesa_common += files('x86-64/x86-64.h', 'x86-64/xform4.S')
+  inc_libmesa_asm = include_directories('x86-64')
 endif
 # TODO: sparc
 
   [files_libmesa_common, files_libmesa_classic],
   c_args : [c_vis_args, c_msvc_compat_args],
   cpp_args : [cpp_vis_args, cpp_msvc_compat_args],
-  include_directories : [inc_common, include_directories('main')],
+  include_directories : [inc_common, inc_libmesa_asm, include_directories('main')],
   link_with : [libglsl, libmesa_sse41],
   dependencies : idep_nir_headers,
   build_by_default : false,
   [files_libmesa_common, files_libmesa_gallium],
   c_args : [c_vis_args, c_msvc_compat_args],
   cpp_args : [cpp_vis_args, cpp_msvc_compat_args],
-  include_directories : [inc_common, include_directories('main')],
+  include_directories : [inc_common, inc_libmesa_asm, include_directories('main')],
   link_with : [libglsl, libmesa_sse41],
   dependencies : [idep_nir_headers, dep_vdpau],
   build_by_default : false,