dev-db/mariadb: restrict <libfmt-10 for 10.11.5

MariaDB-10.11.5 fails to build with >=libfmt-10.

Bug: https://bugs.gentoo.org/935299
Bug: https://bugs.gentoo.org/938106
Signed-off-by: Petr Vaněk <arkamar@gentoo.org>

dev-db/mariadb/mariadb-10.11.5-r1.ebuild

@@ -37,8 +37,9 @@ S="${WORKDIR}/mysql"
 
 # Be warned, *DEPEND are version-dependant
 # These are used for both runtime and compiletime
+# <libfmt-10 bugs #938106 #935299
 COMMON_DEPEND="
-	dev-libs/libfmt:=
+	<dev-libs/libfmt-10:=
 	>=dev-libs/libpcre2-10.34:=
 	>=sys-apps/texinfo-4.7-r1
 	sys-libs/ncurses:0=