superlu: Build depends on tcsh for Linuxbrew
superlu: Build depends on tcsh for Linuxbrew

Fix the error:
Testing SINGLE PRECISION linear equation routines
csh stest.csh
make[1]: csh: Command not found

Closes #4991.

Signed-off-by: Shaun Jackman <b580dab3251a9622aba3803114310c23fdb42900@gmail.com>

heuermh/homebrew-science,dpo/homebrew-science,andrewjpage/homebrew-science,quantumsteve/homebrew-science,philippbayer/homebrew-science,pditommaso/homebrew-science,maplesond/homebrew-science