Enable building V8 for Android on Mac

build/common.gypi

Index: build/common.gypi
===================================================================
--- build/common.gypi	(revision 12162)
+++ build/common.gypi	(working copy)
@@ -164,7 +164,8 @@
           'V8_TARGET_ARCH_MIPS',
         ],
         'variables': {
-          'mipscompiler': '<!($(echo ${CXX:-$(which g++)}) -v 2>&1 | grep -q "^Target: mips" && echo "yes" || echo "no")',
+          'mipscompiler': '<!($(echo ${CXX:-$(which g++)}) -v 2>&1 | \
+                          grep -q "^Target: mips" && echo "yes" || echo "no")',
         },
         'conditions': [
           ['mipscompiler=="yes"', {
@@ -279,7 +280,8 @@
         'target_conditions': [
           ['_toolset=="host"', {
             'variables': {
-              'm32flag': '<!((echo | $(echo ${CXX_host:-$(which g++)}) -m32 -E - > /dev/null 2>&1) && echo -n "-m32" || true)',
+              'm32flag': '<!((echo | $(echo ${CXX_host:-$(which g++)}) -m32 \
+                              -E - > /dev/null 2>&1) && echo "-m32" || true)',
             },
             'cflags': [ '<(m32flag)' ],
             'ldflags': [ '<(m32flag)' ],
@@ -289,7 +291,9 @@
           }],
           ['_toolset=="target"', {
             'variables': {
-              'm32flag': '<!((echo | $(echo ${CXX_target:-${CXX:-$(which g++)}}) -m32 -E - > /dev/null 2>&1) && echo -n "-m32" || true)',
+              'm32flag': '<!((echo | \
+                         $(echo ${CXX_target:-${CXX:-$(which g++)}}) -m32 -E - \
+                           > /dev/null 2>&1) && echo "-m32" || true)',
             },
             'cflags': [ '<(m32flag)' ],
             'ldflags': [ '<(m32flag)' ],