LibC: Implement some mem* and str* functions in assembly

This made them a lot faster on modern cpus with optimized rep stos and
rep movs

kernel/CMakeLists.txt

@@ -148,6 +148,10 @@ set(BAN_SOURCES
 set(KLIBC_SOURCES
 	klibc/ctype.cpp
 	klibc/string.cpp
+
+	# Ehhh don't do this but for now libc uses the same stuff kernel can use
+	# This won't work after libc starts using sse implemetations tho
+	../userspace/libraries/LibC/arch/${BANAN_ARCH}/string.S
 )
 
 set(LIBFONT_SOURCES