Separated functionality into separate files. Added initial (untested) support for ARM.

lib/string.c

@@ -0,0 +1,12 @@
+#include <stddef.h>
+
+#include <brados/string.h>
+
+// Find the length of a string
+size_t strlen(const char *str)
+{
+	size_t len = 0;
+	while (str[len] != 0)
+		len++;
+	return len;
+}