Remove line breaks that GYP didn't like

build/common.gypi

 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 265 matching lines @@
             'GenerateMapFile': 'true',
           },
         },
       }],
       ['OS=="linux" or OS=="freebsd" or OS=="openbsd" or OS=="solaris" \
          or OS=="netbsd"', {
         'conditions': [
           [ 'v8_target_arch!="x64"', {
             # Pass -m32 to the compiler iff it understands the flag.
             'variables': {
-              'm32flag': '<!(' +
-                  '(echo | $(echo ${CXX:-$(which g++)}) -m32 -E - ' +
-                  '    > /dev/null 2>&1) ' +
-                  '&& echo -n "-m32" || true)',
+              'm32flag': '<!((echo | $(echo ${CXX:-$(which g++)}) -m32 -E - > /dev/null 2>&1) && echo -n "-m32" || true)',
             },
             'cflags': [ '<(m32flag)' ],
             'ldflags': [ '<(m32flag)' ],
           }],
           [ 'v8_no_strict_aliasing==1', {
             'cflags': [ '-fno-strict-aliasing' ],
           }],
         ],  # conditions
       }],
       ['OS=="solaris"', {
@@ skipping 114 matching lines @@
                 # some test cases can cause stack overflow.
                 # 'StackReserveSize': '297152',
               },
             },
           }],  # OS=="win"
         ],  # conditions
       },  # Release
     },  # configurations
   },  # target_defaults
 }