eglibc: use 2.15 by default

SVN-Revision: 32104

toolchain/eglibc/Config.in

@@ -1,7 +1,7 @@
 choice
 	prompt "eglibc version"
 	depends on TOOLCHAINOPTS && USE_EGLIBC
-	default EGLIBC_VERSION_2_13
+	default EGLIBC_VERSION_2_15
 	help
 	  Select the version of eglibc you wish to use.