Recalbox 8 support&fixes

-Added 2 installation scripts for Recalbox 8; one for default analog/jack audio and
one with fixes for HDMI auido for MakeCode Arcade games
-Added systemlist.xml, theme and support files for MCA on Recalbox 8
-Small bugfixes in Recalbox 7.1.1 installation script

Not tested yet, appreciate your testing and feedback!

McAirpos/MakeCode/sd/arcade.cfg

@@ -1,4 +1,4 @@
-SCAN_CODES=/dev/input/event7
+SCAN_CODES=/dev/input/event0
 BTN_LEFT=30
 BTN_RIGHT=32
 BTN_UP=17

McAirpos/Recalbox8.0/etc/modprobe.d/alsa-base.conf

@@ -0,0 +1,4 @@
+options vc4 index=0
+options snd_bcm2835 index=1
+options snd-usb-audio index=-2
+options snd slots=vc4,snd_bcm2835

McAirpos/Recalbox8.0/systemlist.xml_MakeCode_RB

@@ -0,0 +1,11 @@
+  <system uuid="7f9da90c-5a4b-475d-a9c2-efdbfc0d9d78" name="MakeCode" fullname="MakeCode Arcade" platforms="MakeCode">
+    <descriptor command="/usr/bin/launCharc %ROM%" path="%ROOT%/makecode" theme="makecode" extensions=".elf .ELF" icon="$F251"/>
+    <scraper screenscraper="76"/>
+    <properties type="computer" pad="mandatory" keyboard="optional" mouse="no" lightgun="no" releasedate="2020-01" retroachievements="0"/>
+    <emulatorList>
+      <emulator name="launCharc">
+        <core name="launCharc" priority="1" extensions=".elf .ELF" netplay="0" compatibility="high" speed="high"/>
+      </emulator>
+    </emulatorList>
+  </system>
+</systemList>

McAirpos/Recalbox8.0/themes/recalbox-next/makecode/custom.xml

@@ -0,0 +1,53 @@
+<theme>
+	<formatVersion>4</formatVersion>
+
+	<view name="system">
+		<text name="info1" extra="true">
+			<text>Developer : Microsoft</text>
+		</text>
+		<text name="info2" extra="true">
+			<text>Initial release : January 6, 2020</text>
+		</text>
+		<text name="info3" extra="true">
+			<text>Website : http://arcade.makecode.com</text>
+		</text>
+		<text name="info4" extra="true">
+			<text>Written in : STS/C++</text>
+		</text>
+		<text name="info5" extra="true">
+			<text>"Microsoft MakeCode Arcade is a web-based beginner-friendly</text>
+		</text>
+		<text name="info6" extra="true">
+			<text>the hardware of arcade game systems in software</text>
+			<text>code editor to create retro arcade games ...</text>
+		</text>
+		<text name="info7" extra="true">
+			<text>... with MakeCode, you can either use blocks[, Python]</text>
+		</text>
+		<text name="info8" extra="true">
+			<text>or JavaScript to build your program ..."</text>
+		</text>
+		<text name="info9" extra="true">
+			<text>Video : "... 160x120 screen showing 16 colors ..."</text>
+		</text>
+		<text name="info10" extra="true">
+			<text>Sound : "... 4-channel retro-appropriate sound system ..."</text>
+		</text>
+
+	</view>
+
+	<view name="system, basic, detailed">
+		<image name="band1" extra="true">
+			<color>FF69B4</color>
+		</image>
+		<image name="band2" extra="true">
+			<color>36D787</color>
+		</image>
+		<image name="band3" extra="true">
+			<color>4B77BE</color>
+		</image>
+		<image name="band4" extra="true">
+			<color>BE90D4</color>
+		</image>
+	</view>
+</theme>