Merge branch 'master' into sam460ex

Merge remote-tracking branch 'haiku/master' into package-management

This reverts 8f7f28a7c3db28711920ad5d15df401fae90bcf1 (OpenGL: Upgrade
to
Mesa 9.2).

Conflicts:
build/jam/BuildFeatures
build/j

Merge remote-tracking branch 'haiku/master' into package-management

This reverts 8f7f28a7c3db28711920ad5d15df401fae90bcf1 (OpenGL: Upgrade
to
Mesa 9.2).

Conflicts:
build/jam/BuildFeatures
build/jam/HaikuImage
build/jam/OptionalPackages
build/scripts/build_cross_tools_gcc4
src/add-ons/opengl/swpipe/Jamfile
src/apps/diskusage/Jamfile
src/kits/tracker/ContainerWindow.cpp
src/kits/tracker/DeskWindow.cpp
src/kits/tracker/Jamfile

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Rename driver folder 'usb_audio' to 'usb'

... just because the source path ./kernel/drivers/audio/usb obviously
references audio hardware so "_audio" suffix is excessive.

No functional changes.