Improve Python and Linenoise

This change reinvents all the GNU Readline features I discovered that I
couldn't live without, e.g. UTF-8, CTRL-R search and CTRL-Y yanking. It
now feels just as good in terms of user interface from the subconscious
workflow perspective. It's real nice to finally have an embeddable line
reader that's actually good with a 30 kb footprint and a bsd-2 license.

This change adds a directory to the examples folder, explaining how the
new Python compiler may be used.  Some of the bugs with Python binaries
have been addressed but overall it's still a work in progress.

third_party/linenoise/linenoise.mk

@@ -25,7 +25,6 @@ THIRD_PARTY_LINENOISE_A_DIRECTDEPS =				\
 	LIBC_STDIO						\
 	LIBC_RUNTIME						\
 	LIBC_SYSV_CALLS						\
-	LIBC_X							\
 	LIBC_STR						\
 	LIBC_UNICODE						\
 	LIBC_STUBS
@@ -44,6 +43,7 @@ $(THIRD_PARTY_LINENOISE_A).pkg:					\
 
 $(THIRD_PARTY_LINENOISE_A_OBJS):				\
 		OVERRIDE_CFLAGS +=				\
+			-fno-jump-tables			\
 			-ffunction-sections			\
 			-fdata-sections