python3: base-nova compatibility

The vfs is now populated with the python libs using a tar file system.
This is necessary because providing the zip from the rom did not work on NOVA.
The issue here is that python's zipimporter uses fseek with SEEK_END to
find the zip header. Unfortunately, the file size cannot be correctly
determined from the ROM session (see #1920) so that the fseek fails.

run/python3.run

@@ -35,6 +35,7 @@ set config {
 		<service name="RM"/>
 		<service name="CPU"/>
 		<service name="LOG"/>
+		<service name="IO_PORT"/>
 	</parent-provides>
 	<default-route>
 		<any-service> <parent/> <any-child/> </any-service>
@@ -51,7 +52,7 @@ set config {
 	<start name="python3">
 		<resource name="RAM" quantum="16M"/>
 		<config>
-			<pythonpath name="lib/python3.zip" />
+			<pythonpath name="/python/Lib:" />
 			<file name="hello.py" />
 			<vfs>
 				<dir name="dev">
@@ -61,8 +62,8 @@ set config {
 					<rtc/>
 					<zero/>
 				</dir>
-				<dir name="lib">
-					<rom name="python3.zip" />
+				<dir name="python">
+					<tar name="python3.tar" />
 				</dir>
 				<inline name="hello.py">
 print(" \r\n\r");
@@ -93,12 +94,12 @@ install_config $config
 # generic modules
 set boot_modules {
 	core init
-	ld.lib.so libc.lib.so libm.lib.so python3.lib.so posix.lib.so
+	ld.lib.so libc.lib.so libm.lib.so python3.lib.so 
 	python3
 	vfs_jitterentropy.lib.so
 	timer
 	rtc_drv
-	python3.zip
+	python3.tar
 	vfs.lib.so
 }