Failure to build most recent firefox

[Paul Goyette <paul%whooppee.com@localhost>]

With pkgsrc updated on 2019-03-03 at 21:10:26 UTC, and having started
from a completely empty sandbox, I am unable to build the latest
firefox.  The following errors seem to be the problem:

   Compiling ordered-float v1.0.1
error: unrecognized platform-specific intrinsic function: 
`x86_mm_movemask_ps`
  --> 
/tmp/pkgs/www/firefox/work.x86_64/firefox-65.0.2/third_party/rust/simd/src
/x86/sse2.rs:10:5
   |
10 |     fn x86_mm_movemask_ps(x: f32x4) -> i32;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: unrecognized platform-specific intrinsic function: 
`x86_mm_max_ps`
  --> 
/tmp/pkgs/www/firefox/work.x86_64/firefox-65.0.2/third_party/rust/simd/src
/x86/sse2.rs:11:5
   |
11 |     fn x86_mm_max_ps(x: f32x4, y: f32x4) -> f32x4;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: unrecognized platform-specific intrinsic function: 
`x86_mm_min_ps`
  --> 
/tmp/pkgs/www/firefox/work.x86_64/firefox-65.0.2/third_party/rust/simd/src
/x86/sse2.rs:12:5
   |
12 |     fn x86_mm_min_ps(x: f32x4, y: f32x4) -> f32x4;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: unrecognized platform-specific intrinsic function: 
`x86_mm_rsqrt_ps`
  --> 
/tmp/pkgs/www/firefox/work.x86_64/firefox-65.0.2/third_party/rust/simd/src
/x86/sse2.rs:13:5
   |
.
.
.
error: unrecognized platform-specific intrinsic function: 
`x86_mm_subs_epu16`
  --> 
/tmp/pkgs/www/firefox/work.x86_64/firefox-65.0.2/third_party/rust/simd/src
/x86/sse2.rs:45:5
   |
45 |     fn x86_mm_subs_epu16(x: u16x8, y: u16x8) -> u16x8;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 33 previous errors

error: Could not compile `simd`.
warning: build failed, waiting for other jobs to finish...


+------------------+--------------------------+----------------------------+
| Paul Goyette     | PGP Key fingerprint:     | E-mail addresses:          |
| (Retired)        | FA29 0E3B 35AF E8AE 6651 | paul at whooppee dot com   |
| Kernel Developer | 0786 F758 55DE 53BA 7731 | pgoyette at netbsd dot org |
+------------------+--------------------------+----------------------------+