RFC: drop patches/tools.patch from icedtea6

[Omair Majid]

Hi,

The attached patch drops patches/tools.patch from icedtea6.

tools.patch consists of 2 parts: the first part modifies 
jdk/make/tools/sharing/classlist.$(PLATFORM) and the other modifies
jdk/make/java/awt/Makefile.

As described in jdk/make/tools/sharing/README.txt, classlist.$(PLATFORM) 
is the class list used in class data sharing (-Xshare). The patch 
removes DebugHelper and DebugHelperStub classes, but leaves many other 
classes which are not present in IcedTea6 (for example 
java/util/Hashtable$EmptyEnumerator). In fact, a large changeset went 
into OpenJDK7 to update this classlist [1]. As such, this part of 
tools.patch is not necessary (otherwise we would see more build errors) 
nor sufficient (since it leaves many other removed classes alone).

The second part of the patch adds a phony target sources which is not 
used anywhere.

I have done a bootstrap build without a patches/tools.patch and I have 
not seen any problems.

Any thoughts on dropping the patch? Matthias, I see that this patch was 
dropped once (icedtea6 changeset 2855ab5fe0e7) but you reverted it. Do 
you know if the problems were caused by this patch, or was it one of the 
other patches that was dropped?

Cheers,
Omair

[1] http://hg.openjdk.java.net/jdk7/jdk7/jdk/rev/da5e33af0e61
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