Libraries: Create top level directory for libraries.

Things were getting a little crowded in the project root, so this patch
moves the Lib*/ directories into Libraries/.

Libraries/LibC/locale.cpp

@@ -0,0 +1,27 @@
+#include <assert.h>
+#include <locale.h>
+#include <stdio.h>
+
+extern "C" {
+
+static char default_decimal_point[] = ".";
+static char default_thousands_sep[] = ",";
+static char default_grouping[] = "\x03\x03";
+
+static struct lconv default_locale = {
+    default_decimal_point,
+    default_thousands_sep,
+    default_grouping,
+};
+
+char* setlocale(int category, const char* locale)
+{
+    dbgprintf("FIXME(LibC): setlocale(%d, %s)\n", category, locale);
+    return nullptr;
+}
+
+struct lconv* localeconv()
+{
+    return &default_locale;
+}
+}