ARM: update defaults for flags

build/toolchain.gypi

Index: build/toolchain.gypi
diff --git a/build/toolchain.gypi b/build/toolchain.gypi
index a9958ce8d66b2cc879ca08d5e30681501cc5c023..9d48c147722407c7fded44a56acf5ca7b116dee8 100644
--- a/build/toolchain.gypi
+++ b/build/toolchain.gypi
@@ -157,6 +157,7 @@
                         'defines': [
                           'CAN_USE_VFP3_INSTRUCTIONS',
                           'CAN_USE_VFP32DREGS',
+                          'CAN_USE_NEON',
                         ],
                       }],
                     ],
@@ -215,6 +216,26 @@
                     'defines': [
                       'ARM_TEST',
                     ],
+                    'conditions': [
+                      [ 'arm_fpu=="vfpv3-d16"', {
+                        'defines': [
+                          'CAN_USE_VFP3_INSTRUCTIONS',
+                        ],
+                      }],
+                      [ 'arm_fpu=="vfpv3"', {
+                        'defines': [
+                          'CAN_USE_VFP3_INSTRUCTIONS',
+                          'CAN_USE_VFP32DREGS',
+                        ],
+                      }],
+                      [ 'arm_fpu=="neon"', {
+                        'defines': [
+                          'CAN_USE_VFP3_INSTRUCTIONS',
+                          'CAN_USE_VFP32DREGS',
+                          'CAN_USE_NEON',
+                        ],
+                      }],
+                    ],
                   }],
                 ],
               }, {
@@ -228,6 +249,8 @@
                       [ 'arm_fpu=="default"', {
                         'defines': [
                           'CAN_USE_VFP3_INSTRUCTIONS',
+                          'CAN_USE_VFP32DREGS',
+                          'CAN_USE_NEON',
                         ],
                       }],
                       [ 'arm_fpu=="vfpv3-d16"', {
@@ -245,6 +268,7 @@
                         'defines': [
                           'CAN_USE_VFP3_INSTRUCTIONS',
                           'CAN_USE_VFP32DREGS',
+                          'CAN_USE_NEON',
                         ],
                       }],
                     ],