 George Hartzell
		
	
	b9d7903cdb
	
	
	Add link dependency on xproto to xau (recent dependency mechanics changes?) (#5624)
			George Hartzell
		
	
	b9d7903cdb
	
	
	Add link dependency on xproto to xau (recent dependency mechanics changes?) (#5624)
		
			
			* Add link dependency on xproto to xau
The libxcb build was failing like so:
```
1 error found in build log:
     [ ... ]
     131   checking whether to build developer documentation... yes
     132   checking for doxygen... /usr/bin/doxygen
     133   checking for dot... /usr/bin/dot
     134   checking for CHECK... no
     135   checking for XCBPROTO... yes
     136   checking for NEEDED... no
  >> 137   configure: error: Package requirements (pthread-stubs xau >= 0.99.2) were not met:
     138
     139   Package 'xproto', required by 'xau', not found
     140
     141   Consider adjusting the PKG_CONFIG_PATH environment variable if you
     142   installed software in a non-standard prefix.
     143
```
This adds a link dependency on libxproto that allows the libxcb build to
succeed.
* Change more build deps to build, link
These were also necessary for emacs+X to build.
* Fix flake8 complaint
		
	
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LLNL-CODE-647188
