Remove line breaks that GYP didn't like

Review URL: https://chromiumcodereview.appspot.com/10067032

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11301 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

build/common.gypi

@@ -283,10 +283,7 @@
           [ '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)' ],