move system include files to subdir

vor 3 Monaten · 102ad64330
--- a/assert.h
+++ b/assert.h
--- a/include/assert.h
+++ b/include/assert.h
@ -0,0 +1 @@
 extern void assert(int condition);
--- a/include/stdio.h
+++ b/include/stdio.h
@ -1 +1 @@
 extern int printf(char *, ...);
 extern int printf(char *format, ...);
--- a/stdio.h
+++ b/stdio.h
@ -1 +0,0 @@
 extern int printf(char *, ...);
--- a/stdlib.h
+++ b/stdlib.h
--- a/string.h
+++ b/string.h