genkernel: do not use /var/cache for storing source tarballs

/var/cache is expected to be created at runtime if needed

Makefile

@@ -43,8 +43,8 @@ install: default
 	cp -rp netboot $(DESTDIR)/$(PREFIX)/share/genkernel/
 	cp -rp patches $(DESTDIR)/$(PREFIX)/share/genkernel/
 
-	install -d $(DESTDIR)/var/cache/genkernel/src
-	install -m 644 tarballs/* $(DESTDIR)/var/cache/genkernel/src/
+	install -d $(DESTDIR)/var/lib/genkernel/src
+	install -m 644 tarballs/* $(DESTDIR)/var/lib/genkernel/src/
 
 clean:
 	rm -f $(EXTRA_DIST)

genkernel.conf

@@ -184,7 +184,7 @@ GK_SHARE="${GK_SHARE:-/usr/share/genkernel}"
 # Location of the default cache
 CACHE_DIR="/var/cache/genkernel"
 # Location of DISTDIR, where our source tarballs are stored
-DISTDIR="${CACHE_DIR}/src"
+DISTDIR="/var/lib/genkernel/src"
 # Log output file
 LOGFILE="/var/log/genkernel.log"
 # Debug Level