LibC: Add dummy functions for rename() and strftime()

I don't really want to implement them right now, but they are required
to exist for some ports.

libc/stdio.cpp

@@ -1,3 +1,6 @@
+#include <BAN/Assert.h>
+#include <BAN/Debug.h>
+
 #include <bits/printf.h>
 #include <errno.h>
 #include <fcntl.h>
@@ -603,7 +606,11 @@ int remove(const char* path)
 }
 
 // TODO
-int rename(const char*, const char*);
+int rename(const char* old, const char* _new)
+{
+    dwarnln("rename({}, {})", old, _new);
+    ASSERT_NOT_REACHED();
+}
 
 void rewind(FILE* file)
 {

libc/time.cpp

@@ -1,3 +1,6 @@
+#include <BAN/Assert.h>
+#include <BAN/Debug.h>
+
 #include <sys/syscall.h>
 #include <time.h>
 #include <unistd.h>
@@ -75,3 +78,9 @@ struct tm* localtime(const time_t* timer)
 	// FIXME: support timezones
 	return gmtime(timer);
 }
+
+size_t strftime(char* __restrict s, size_t maxsize, const char* __restrict format, const struct tm* __restrict timeptr)
+{
+    dwarnln("strftime({}, {}, {}, {})", s, maxsize, format, timeptr);
+    ASSERT_NOT_REACHED();
+}

ports/doom/patches/0001-Add-support-for-banan-os.patch

@@ -5,7 +5,7 @@ Subject: [PATCH] Add support for banan-os
 
 ---
  doomgeneric/Makefile.banan_os        |  57 +++++++++++
- doomgeneric/doomgeneric_banan_os.cpp | 144 +++++++++++++++++++++++++++
+ doomgeneric/doomgeneric_banan_os.cpp | 138 +++++++++++++++++++++++++++
  2 files changed, 200 insertions(+)
  create mode 100644 doomgeneric/Makefile.banan_os
  create mode 100644 doomgeneric/doomgeneric_banan_os.cpp
@@ -79,7 +79,7 @@ new file mode 100644
 index 0000000..9161771
 --- /dev/null
 +++ b/doomgeneric/doomgeneric_banan_os.cpp
-@@ -0,0 +1,144 @@
+@@ -0,0 +1,138 @@
 +extern "C"
 +{
 +#include "doomgeneric.h"
@@ -217,12 +217,6 @@ index 0000000..9161771
 +	return 0;
 +}
 +
-+int rename(const char* oldp, const char* newp)
-+{
-+	fprintf(stderr, "rename(\"%s\", \"%s\")\n", oldp, newp);
-+	exit(1);
-+}
-+
 +}
 -- 
 2.45.2