update exomizer to 3.1.1 with fast decruncher flags

This increases the size of charset3 to 4 blocks instead of 3,
and is said to give faster decrunch time.

It also updates the exomizer submodule to point at the official upstream,
not a defunct github mirror.

.gitmodules

@@ -3,4 +3,4 @@
 	url = https://github.com/cc65/cc65
 [submodule "exomizer"]
 	path = exomizer
-	url = https://github.com/bitshifters/exomizer
+	url = https://bitbucket.org/magli143/exomizer/

Makefile

@@ -16,7 +16,7 @@ endif
 	done
 	mv -f 80columns.d64.tmp 80columns.d64
 
-EXOMIZER_SFX := exomizer sfx 51200 -q -n
+EXOMIZER_SFX := exomizer sfx 51200 -q -n -T4 -M256 -Di_perf=2
 .INTERMEDIATE: charset.bin
 charset.prg: charset.bin
 	(printf '\0\320'; cat $<) > $@.tmp
@@ -81,13 +81,13 @@ toolchain-cc65:
 
 .PHONY: toolchain-exomizer
 toolchain-exomizer:
-	[ -d exomizer/exomizer2/src ] || git submodule update --init exomizer
+	[ -d exomizer/src ] || git submodule update --init exomizer
 
-	$(MAKE) -C exomizer/exomizer2/src CFLAGS="-Wall -Wstrict-prototypes -pedantic -O3"
+	$(MAKE) -C exomizer/src CFLAGS="-Wall -Wstrict-prototypes -pedantic -O3"
 
 	mkdir -p bin
 
-	cp exomizer/exomizer2/src/exomizer bin/
+	cp exomizer/src/exomizer bin/
 
 	# have to do this, or git will report untracked files
 	(cd exomizer && git clean -dxf)

exomizer

@@ -1 +1 @@
-Subproject commit 2426d97207c8dff23cd2a94cc768c8be87a7b5d0
+Subproject commit 6a152b5605648f7a41eadd4b011a93ec92f74dd8