package/glibc: enable lock elision on x86_64 hosts

Signed-off-by: Steven Noonan <steven@uplinklabs.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/glibc/glibc.mk

@@ -90,6 +90,7 @@ define GLIBC_CONFIGURE_CMDS
 		--prefix=/usr \
 		--enable-shared \
 		$(if $(BR2_SOFT_FLOAT),--without-fp,--with-fp) \
+		$(if $(BR2_x86_64),--enable-lock-elision) \
 		--with-pkgversion="Buildroot" \
 		--without-cvs \
 		--disable-profile \