[gperftools/el6] hack in autoconf ver

[Tom Callaway]

commit e13b06f4216cfb1cc39d6a2da2c969bc469c81e3
Author: Tom Callaway <spot at fedoraproject.org>
Date:   Tue Jun 4 10:52:28 2013 -0400

    hack in autoconf ver

 gperftools.spec |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gperftools.spec b/gperftools.spec
index ed75371..3e98a8f 100644
--- a/gperftools.spec
+++ b/gperftools.spec
@@ -67,6 +67,8 @@ sed -i 's/\r//' README_windows.txt
 # No need to have exec permissions on source code
 chmod -x src/sampler.h src/sampler.cc
 
+# Hey, I bet this still works.
+sed -i 's|AC_PREREQ([2.68])|AC_PREREQ([2.63])|g' configure.ac
 autoreconf -i
 
 %build