first usable version of kernel and commands

After an year of hard work, this is a first "usable" version of Jehanne.

qa/gnu/gcc/build.json

@@ -0,0 +1,11 @@
+{
+	"RegressionTests": {
+		"Include": [
+			"/sys/src/cmd/cmd.json"
+		],
+		"Install": "/arch/$ARCH/qa/gnu/gcc",
+		"SourceFilesCmd": [
+			"rune.c"
+		]
+	}
+}

qa/gnu/gcc/rune.c

@@ -0,0 +1,56 @@
+/*
+ * This file is part of Jehanne.
+ *
+ * Copyright (C) 2015 Giacomo Tesio <giacomo@tesio.it>
+ *
+ * Jehanne is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 2 of the License.
+ *
+ * Jehanne is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Jehanne.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include <u.h>
+#include <libc.h>
+
+/* Test rune assignment: should not produce any warning
+ * see https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67132
+ */
+void
+main(void)
+{
+	int fd;
+	static Rune r[16] = L"Ciao Mondo!";
+	static Rune buf[16];
+
+	if((fd = create("/tmp/runetest.txt", OWRITE, 0666L)) < 0) {
+		print("FAIL: open: %r\n");
+		exits("FAIL");
+	}
+	if(write(fd, r, sizeof(r)) < 0){
+		print("FAIL: fprint: %r\n");
+		exits("FAIL");
+	}
+	close(fd);
+	if((fd = open("/tmp/runetest.txt", OREAD)) < 0) {
+		print("FAIL: open: %r\n");
+		exits("FAIL");
+	}
+	if(read(fd, (char*)buf, sizeof(buf)) < 0){
+		print("FAIL: read: %r\n");
+		exits("FAIL");
+	}
+	close(fd);
+	if (runestrcmp(r, buf) != 0){
+		print("FAIL: got '%S' instead of '%S'.\n", buf, r);
+		exits("FAIL");
+	} 
+
+	print("PASS\n");
+	exits("PASS");
+}