arm: Always build the NEON SIMD code when targetting ARMv7-A devices.

third_party/libjpeg_turbo/libjpeg.gyp

Index: third_party/libjpeg_turbo/libjpeg.gyp
===================================================================
--- third_party/libjpeg_turbo/libjpeg.gyp	(revision 144345)
+++ third_party/libjpeg_turbo/libjpeg.gyp	(working copy)
@@ -155,10 +155,12 @@
                 'simd/jiss2red-64.asm',
               ],
             }],
-            # The ARM SIMD implementation requires the Neon instruction set.
+            # The ARM SIMD implementation can be used for devices that support
+            # the NEON instruction set. This is done dynamically by probing CPU
+            # features at runtime, so always compile it for ARMv7-A devices.
             [ 'target_arch=="arm"', {
               'conditions': [
-                [ 'arm_neon==1', {
+                [ 'armv7 == 1 or arm_neon == 1', {
                   'sources': [
                     'simd/jsimd_arm.c',
                     'simd/jsimd_arm_neon.S',