MAINTAINERS: add myself as the maintainer for the nolibc header file(s)

I don't expect too many updates there so I should not become a
bottleneck, and if I become one, it will mean that someone will be
more active than me and will be in a better position than me to take
over maintainership :-)

Signed-off-by: Willy Tarreau <w@1wt.eu>
diff --git a/MAINTAINERS b/MAINTAINERS
index 7d37f8a..adc1874 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -10743,6 +10743,12 @@
 F:	drivers/power/supply/isp1704_charger.c
 F:	drivers/power/supply/rx51_battery.c
 
+NOLIBC HEADER FILE
+M:	Willy Tarreau <w@1wt.eu>
+S:	Maintained
+T:	git git://git.kernel.org/pub/scm/linux/kernel/git/wtarreau/nolibc.git
+F:	tools/include/nolibc/
+
 NTB AMD DRIVER
 M:	Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
 L:	linux-ntb@googlegroups.com