squid: fix build failure after bump

Add missing patch, fixes:
http://autobuild.buildroot.net/results/f6a/f6a6dd1f3138406d1daa31e5e4ff5d5026b3c069/

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/squid/squid-02-atomic-cross.patch

@@ -0,0 +1,17 @@
+AC_RUN_IFELSE is bad for cross compiling, switch to AC_COMPILE_IFELSE
+since it's enough for this test.
+
+Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
+
+diff -Nura squid-3.3.9.orig/configure.ac squid-3.3.9/configure.ac
+--- squid-3.3.9.orig/configure.ac	2013-09-13 09:15:32.473365627 -0300
++++ squid-3.3.9/configure.ac	2013-09-13 13:27:06.829711487 -0300
+@@ -392,7 +392,7 @@
+ dnl Check for atomic operations support in the compiler
+ dnl
+ AC_MSG_CHECKING([for GNU atomic operations support])
+-AC_RUN_IFELSE([AC_LANG_PROGRAM([[
++AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+     int n = 0;
+ ]],[[
+     __sync_add_and_fetch(&n, 10); // n becomes 10