Try ARMv7 and NEON for Daisy.

gyp/libpng.gyp

 # Copyright 2014 Google Inc.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'skia_warnings_as_errors': 0,
   },
   'targets': [
@@ skipping 18 matching lines @@
               'include_dirs': [
                 '../third_party/externals/libpng',
                 # Needed for generated pnglibconf.h
                 '../third_party/libpng',
               ],
             },
             'cflags': [
               '-w',
               '-fvisibility=hidden',
             ],
-            'conditions': [
-              ['not arm_neon', {
-                'defines': [
-                    # FIXME: Why is this needed? Without it, pngpriv.h sets it
-                    # to 2 if __ARM_NEON is defined, but shouldn't __ARM_NEON
-                    # not be defined since arm_neon is 0?
-                    'PNG_ARM_NEON_OPT=0',
-                ],
-              }],
+            'defines': [
+                # TODO: it'd be nice to enable PNG's NEON when possible.
+                'PNG_ARM_NEON_OPT=0',
             ],
             'sources': [
               '../third_party/externals/libpng/png.c',
               '../third_party/externals/libpng/pngerror.c',
               '../third_party/externals/libpng/pngget.c',
               '../third_party/externals/libpng/pngmem.c',
               '../third_party/externals/libpng/pngpread.c',
               '../third_party/externals/libpng/pngread.c',
               '../third_party/externals/libpng/pngrio.c',
               '../third_party/externals/libpng/pngrtran.c',
@@ skipping 33 matching lines @@
                   },
                 }
               ]
             ]
           }
         ]
       ],
     },
   ]
 }