Introduce a new ARMSIMDBC configuration.

tools/gyp/configurations.gypi

Index: tools/gyp/configurations.gypi
diff --git a/tools/gyp/configurations.gypi b/tools/gyp/configurations.gypi
index 81e6b13e805e95ce4ecc9feded6140f02d722526..29f457e7c3b937eb073c11d9e3d3055a5e9aec05 100644
--- a/tools/gyp/configurations.gypi
+++ b/tools/gyp/configurations.gypi
@@ -426,6 +426,38 @@
         ],
       },
 
+      # Special Linux-only targets to enable SIMDBC cross compilation for
+      # non-Android ARM devices.
+      'DebugXARMSIMDBC': {
+        'inherit_from': [
+          'Dart_Base', 'Dart_simdbc_Base', 'Dart_Debug',
+          'Dart_Linux_Base',
+          'Dart_Linux_xarm_Base',
+          'Dart_Linux_Debug',
+        ],
+        'defines': [
+          'DEBUG',
+        ],
+      },
+
+      'ReleaseXARMSIMDBC': {
+        'inherit_from': [
+          'Dart_Base', 'Dart_simdbc_Base', 'Dart_Release',
+          'Dart_Linux_Base',
+          'Dart_Linux_xarm_Base',
+          'Dart_Linux_Release',
+        ],
+      },
+
+      'ProductXARMSIMDBC': {
+        'inherit_from': [
+          'Dart_Base', 'Dart_simdbc_Base', 'Dart_Product',
+          'Dart_Linux_Base',
+          'Dart_Linux_xarm_Base',
+          'Dart_Linux_Product',
+        ],
+      },
+
       # ARM and MIPS hardware configurations are only for Linux and Android.
       'DebugXARM': {
         'inherit_from': [