redhat: Enable glic memory tagging for aarch64

Glibc on arm has a memory tagging option that can be enabled
via GLIBC_TUNABLES="glibc.mem.tagging=$SOMETHING" when glibc
is built with memory tagging support and the kernel/HW supports
MTE. This should be side effect free unless the user turns it
on with approprate HW support.

Signed-off-by: Jeremy Linton <jeremy.linton@arm.com>

glibc.spec

@@ -1118,6 +1118,9 @@ build()
 		--disable-profile \
 %if %{with bootstrap}
 		--without-selinux \
+%endif
+%ifarch aarch64
+		--enable-memory-tagging \
 %endif
 		--disable-crypt ||
 		{ cat config.log; false; }