Fix errors like below

| /home/kraj/work/openembedded-core/build/tmp-eglibc/work/qemumips-oe-linux/zypper-1.5.3-git1+2c5bb6ceb99ecd950ef993e43d77bf0569ea0582-r1/git/src/utils/console.cc:55:8: error: '::isatty' has not been declared                                                                                                                                                  
| /home/kraj/work/openembedded-core/build/tmp-eglibc/work/qemumips-oe-linux/zypper-1.5.3-git1+2c5bb6ceb99ecd950ef993e43d77bf0569ea0582-r1/git/src/utils/console.cc:55:17: error: 'STDOUT_FILENO' was not declared in this scope                                                                                                                                   

Signed-off-by: Khem Raj <raj.khem@gmail.com>

Upstream-Status: Pending
Index: git/src/utils/console.cc
===================================================================
--- git.orig/src/utils/console.cc	2012-03-27 19:12:06.171036356 -0700
+++ git/src/utils/console.cc	2012-03-27 19:12:52.887038622 -0700
@@ -15,6 +15,7 @@
 #include <readline/readline.h>
 #include <readline/history.h>
 #include <cstdlib>
+#include <unistd.h>
 
 using namespace std;