fix(deps): add missing aeabi_memset.S

This file provides __aeabi_memclr8 builtin which the Ubuntu 22.04
version of clang 14 needs to compile. Add it to prevent this oddity from
failing the build.

Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
Change-Id: Id67aa0abba4a27c51b3ed6bb1be84b4e803b44bf
diff --git a/lib/compiler-rt/compiler-rt.mk b/lib/compiler-rt/compiler-rt.mk
index 2338908..b41c4d0 100644
--- a/lib/compiler-rt/compiler-rt.mk
+++ b/lib/compiler-rt/compiler-rt.mk
@@ -35,6 +35,7 @@
 COMPILER_RT_SRCS	+=	lib/compiler-rt/builtins/arm/aeabi_ldivmod.S	\
 				lib/compiler-rt/builtins/arm/aeabi_uldivmod.S	\
 				lib/compiler-rt/builtins/arm/aeabi_memcpy.S	\
+				lib/compiler-rt/builtins/arm/aeabi_memset.S	\
 				lib/compiler-rt/builtins/ctzdi2.c		\
 				lib/compiler-rt/builtins/divdi3.c		\
 				lib/compiler-rt/builtins/divmoddi4.c		\