fixing lang/spidermonkey

[Mikhail Teterin]

Hello!

The attachment contains an upgrade to lang/spidermonkey. The benefits are:

	. build on amd64 at all and _properly_ on all other platforms
	  (-fPIC -DPIC should be used for shared objects everywhere);
	. do not build vendor's own version of libm (fdlibm) -- FreeBSD's
	  -lm provides sufficient functionality (mozilla, firefox contain
	  the same foolishness, BTW);
	. uses -lreadline instead of building vendor's own "editline";
	. unless WITHOUT_TESTS is set, download, patch and run the vendor's
	  set of self-tests;
	. patch to compile cleanly with '-Wall -Werror'.

Mozilla people indicate, that they plan to make a new release of spidermonkey, 
when Firefox-1.5 ships (circa September):

	https://bugzilla.mozilla.org/show_bug.cgi?id=303857

When that takes place, spidermonkey can be used _instead_ of browsers' own 
snapshots of js thus reducing the porting effort, cutting build-times, and 
providing a single place for patches.

Considering that, on one hand, the port is marked broken on amd64 since March 
2004 (a tier-1 platform), and, on the other, nothing depends on it (no new 
possible new breakage), I ask portmgr to also allow me to merge these fixes 
before release -- unless the maintainer objects in a few days.

Thanks!

	-mi
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