read symlink instead of throwing an error (#207)

Author: taylormcd

deps/build.jl

@@ -8,7 +8,8 @@ function find_matlab_root()
                         get(ENV, "MATLAB_HOME", nothing))
     if isnothing(matlab_root)
         matlab_exe = Sys.which("matlab")
-        if !isnothing(matlab_exe) && !islink(matlab_exe) # guard against /usr/local 
+        if !isnothing(matlab_exe)
+            matlab_exe = islink(matlab_exe) ? readlink(matlab_exe) : matlab_exe # guard against /usr/local 
             matlab_root = dirname(dirname(matlab_exe))
         else
             if Sys.isapple()