Addded udunits/2.2.20/gnu-4.9.2 to R 3.4.0 build script.

Author: balston

R-3.4.0_install

@@ -41,6 +41,7 @@ require texinfo/5.2/gnu-4.9.2
 require texlive/2015
 require gsl/1.16/gnu-4.9.2
 require hdf/5-1.8.15/gnu-4.9.2
+require udunits/2.2.20/gnu-4.9.2
 require netcdf/4.3.3.1/gnu-4.9.2
 # require jags/3.4.0/gnu.4.9.2-openblas
 require jags/4.2.0/gnu.4.9.2-openblas