glibc: disable eglibc 2.18 for sparc

It's broken as well, wants to emit v9 asm.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/glibc/Config.in

@@ -11,6 +11,8 @@ choice
 
 config BR2_EGLIBC_VERSION_2_18
 	bool "2.18-svnr23787"
+	# Build breakage
+	depends on !BR2_sparc
 
 config BR2_EGLIBC_VERSION_2_19
 	bool "2.19-svnr25243"