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svn:author
V 7
zeising
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svn:date
V 27
2020-08-19T08:31:54.287774Z
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svn:log
V 225
MFH: r545240

graphics/mesa: Fix build with -fno-common

Pull in a bunch of upstream patches to graphics/mesa to fix build with
-fno-common, which is the default after the llvm 11 import.

Approved by:	ports-secteam (joenum)

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