[rfc] [icdtea-web]favicon for testsuite

[Jiri Vanek]

When browsers, are lunching our test appelts html pages, they are requesting the favicon. With 
rising number of reproducers the logs are now filled by "fiele not found" [1]
Another approach then to provide a favicon is to modify test server to return "not found" without a 
exception in this particular case.

But I'm more fond for this one - both head and 1.4

J.

[1]
multipleSignaturesPerJarMismatchingJNLP ---
multipleSignaturesPerJarMatchingApplet - firefox: Backuping firefox profiles from 
/home/tester/.mozilla/firefox to /tmp/backupedFirefox_5946057942198395465_profiles.default
multipleSignaturesPerJarMatchingApplet - firefox: Connecting  /usr/bin/firefox -new-tab 
http://localhost:39555/MultipleSignaturesPerJarMatching.html
run: assassin forThread[Thread-5,5,] java.lang.UNIXProcess at 259e3c49 .. done 
/tmp/ICWDR_1374799132_BUILD/icedtea-web-image/bin/javaws -Xtrustall -headless 
http://localhost:39555/MultipleSignaturesPerJarMismatching.jnlp  termination false
run: Getting- GET: /MultipleSignaturesPerJarMatching.html
run: Serving- GET: ./MultipleSignaturesPerJarMatching.html
run: Getting- GET: /favicon.ico
run: Serving- GET: ./favicon.ico
run:
java.io.FileNotFoundException: 
/tmp/ICWDR_1374799132_BUILD/icedtea-web/tests.build/reproducers_test_server_deploydir/./favicon.ico 
(No such file or directory)
	at java.io.FileInputStream.open(Native Method)
	at java.io.FileInputStream.<init>(FileInputStream.java:138)
	at net.sourceforge.jnlp.TinyHttpdImpl.run(TinyHttpdImpl.java:140)

run ---
run: Getting- GET: /favicon.ico
run: Serving- GET: ./favicon.ico
run:
java.io.FileNotFoundException: 
/tmp/ICWDR_1374799132_BUILD/icedtea-web/tests.build/reproducers_test_server_deploydir/./favicon.ico 
(No such file or directory)
	at java.io.FileInputStream.open(Native Method)
	at java.io.FileInputStream.<init>(FileInputStream.java:138)
	at net.sourceforge.jnlp.TinyHttpdImpl.run(TinyHttpdImpl.java:140)


and so on :-/
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