SNOW-748 FIXED Building on OSX 10.6 fails with "warning: -mdynamic-no-pic overrides - fpic or -fPIC"

Originally commited at http://svn.secondlife.com/trac/linden/changeset/3499/projects/2010/snowglobe and http://svn.secondlife.com/trac/linden/changeset/3501

SVN changeset 3499 partially applied with --ignore-whitespace:

	Hunk #1 FAILED at 259.
	Hunk #2 FAILED at 265.
	2 out of 2 hunks FAILED -- saving rejects to file
	indra/llcommon/CMakeLists.txt.rej
	patching file indra/media_plugins/webkit/CMakeLists.txt
	Hunk #1 succeeded at 33 with fuzz 1 (offset -8 lines).
	patching file indra/media_plugins/base/CMakeLists.txt
	patching file indra/media_plugins/gstreamer010/CMakeLists.txt
	patching file indra/media_plugins/example/CMakeLists.txt
	patching file indra/llplugin/CMakeLists.txt

Manually applied to indra/llcommon/CMakeLists.txt (straight forward).

SVN changeset 3501 applied with fuzz 1:

	patching file indra/media_plugins/webkit/CMakeLists.txt
	Hunk #1 succeeded at 33 with fuzz 1 (offset -8 lines).
	Hunk #2 succeeded at 39 with fuzz 1 (offset -8 lines).

No further changes other than that.