fixing pmt swig python installed files
build: updating Makefiles for newer linker requirements.
gruel: using a copy of swig's intrusive_ptr.i to support the PMT wrapping.
gruel: added missing ignores
Merge branch 'next' of gnuradio.org:gnuradio into next
gruel: fixed swig interface file to dereference pmt_t.
Merge remote branch 'jblum/wip/attributes' into next
gruel: fixing structure. Passes make check.
gruel: SWIGing Gruel into Python to access PMTs.
created gruel/attributes.h to house compiler specific attribute macros
replaced instances of attribute with __GR_ATTR from attributes.h
what else has compiler specific attributes?volk - volk is stand-alone, needs its own attributes.hgcell - not touching that, probably gcc only anyways...
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