* gnu/packages/julia.scm (libuv-julia): Update to commit 26dbe56.
(libunwind-for-julia): Remove.
(llvm-patch-url, llvm-patch): New procedures.
(llvm-julia): New variable.
(julia): Update to 1.1.1.
[arguments]: Adjust 'prepare-deps' to new set of dependencies.
Adjust 'hardcode-soname-map': remove openlibm and libfftw handling.
Update file names in 'fix-include-and-link-paths' and 'hardcode-paths'.
Adjust 'disable-broken-tests'.
Pass PREFIX, LIBFLAS, and LIBBLASNAME in #:make-flags; update other
flags.
[inputs]: Replace LLVM-3.9.1 with LLVM-JULIA. Replace
LIBUNWIND-FOR-JULIA with LIBUNWIND. Add "rmath" and "libwhich".
[native-inputs]: Remove "unicode-data".
Co-authored-by: Ludovic Courtès <ludo@gnu.org>