Clean up some code

- Use good ELF technique in cosmo_dlopen()
- Make strerror() conform more to other libc impls
- Introduce __clear_cache() and use it in cosmo_dlopen()
- Remove libc/fmt/fmt.h header (trying to kill off LIBC_FMT)

third_party/quickjs/atom.c

@@ -23,7 +23,6 @@
  * THE SOFTWARE.
  */
 #include "libc/assert.h"
-#include "libc/fmt/fmt.h"
 #include "libc/str/str.h"
 #include "third_party/quickjs/internal.h"
 #include "third_party/quickjs/libregexp.h"

third_party/quickjs/cutils.c

@@ -22,7 +22,6 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
-#include "libc/fmt/fmt.h"
 #include "libc/mem/mem.h"
 #include "libc/str/str.h"
 #include "third_party/quickjs/cutils.h"

third_party/quickjs/date.c

@@ -24,7 +24,6 @@
  */
 #include "libc/calls/struct/timeval.h"
 #include "libc/calls/weirdtypes.h"
-#include "libc/fmt/fmt.h"
 #include "libc/time/struct/tm.h"
 #include "libc/time/time.h"
 #include "third_party/quickjs/internal.h"

third_party/quickjs/dbuf.c

@@ -22,7 +22,6 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
-#include "libc/fmt/fmt.h"
 #include "libc/mem/mem.h"
 #include "libc/str/str.h"
 #include "third_party/quickjs/internal.h"

third_party/quickjs/err.c

@@ -22,7 +22,6 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
-#include "libc/fmt/fmt.h"
 #include "third_party/quickjs/internal.h"
 #include "third_party/quickjs/leb128.h"
 #include "third_party/quickjs/libregexp.h"

third_party/quickjs/json.c

@@ -23,7 +23,6 @@
  * THE SOFTWARE.
  */
 #include "libc/assert.h"
-#include "libc/fmt/fmt.h"
 #include "libc/str/str.h"
 #include "third_party/quickjs/internal.h"
 #include "third_party/quickjs/libregexp.h"

third_party/quickjs/libregexp.c

@@ -23,7 +23,6 @@
  */
 #include "libc/assert.h"
 #include "libc/intrin/likely.h"
-#include "libc/fmt/fmt.h"
 #include "libc/limits.h"
 #include "libc/mem/alloca.h"
 #include "libc/runtime/runtime.h"

third_party/quickjs/parse.c

@@ -23,7 +23,6 @@
  * THE SOFTWARE.
  */
 #include "libc/assert.h"
-#include "libc/fmt/fmt.h"
 #include "libc/runtime/runtime.h"
 #include "libc/str/str.h"
 #include "third_party/quickjs/internal.h"

third_party/quickjs/qjsc.c

@@ -25,7 +25,6 @@
 #include "libc/calls/calls.h"
 #include "libc/dce.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/log/log.h"
 #include "libc/mem/gc.h"
 #include "libc/mem/mem.h"

third_party/quickjs/quickjs-libc.c

@@ -33,7 +33,6 @@
 #include "libc/calls/termios.h"
 #include "libc/errno.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/limits.h"
 #include "libc/mem/mem.h"
 #include "libc/nt/synchronization.h"

third_party/quickjs/quickjs.c

@@ -27,8 +27,6 @@
 #include "third_party/quickjs/list.h"
 #include "third_party/quickjs/quickjs.h"
 #include "libc/assert.h"
-#include "libc/fmt/fmt.h"
-#include "libc/fmt/fmt.h"
 #include "libc/inttypes.h"
 #include "libc/mem/alloca.h"
 #include "third_party/gdtoa/gdtoa.h"

third_party/quickjs/run-test262.c

@@ -26,7 +26,6 @@
 #include "libc/calls/struct/stat.h"
 #include "libc/calls/weirdtypes.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/log/log.h"
 #include "libc/mem/alg.h"
 #include "libc/mem/mem.h"

third_party/quickjs/str.c

@@ -25,7 +25,6 @@
 #include "libc/str/str.h"
 #include "libc/assert.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/runtime/fenv.h"
 #include "third_party/gdtoa/gdtoa.h"
 #include "third_party/quickjs/internal.h"

third_party/quickjs/unicode_gen.c

@@ -24,7 +24,6 @@
  */
 #include "libc/assert.h"
 #include "libc/fmt/conv.h"
-#include "libc/fmt/fmt.h"
 #include "libc/log/log.h"
 #include "libc/mem/alg.h"
 #include "libc/mem/mem.h"