gnu: libngspice: Update to 37.

* gnu/packages/engineering.scm (libngspice): Update to 37.
[arguments]: Remove old "--with-readline=no" work-around
from #:configure-flags.

gnu/packages/engineering.scm

@@ -1782,7 +1782,7 @@ (define-public libngspice
   ;; See <https://debbugs.gnu.org/cgi/bugreport.cgi?bug=27344#236>.
   (package
     (name "libngspice")
-    (version "36")
+    (version "37")
     (source
      (origin
        (method url-fetch)
@@ -1793,7 +1793,7 @@ (define-public libngspice
                             "old-releases/" version
                             "/ngspice-" version ".tar.gz")))
        (sha256
-        (base32 "133za6m9grpnnlb46sijkda7ky41mrbvfdb60i0m695sxy3q50ag"))))
+        (base32 "1gpcic6b6xk3g4956jcsqljf33kj5g43cahmydq6m8rn39sadvlv"))))
     (build-system gnu-build-system)
     (arguments
      `(;; No tests for libngspice exist.
@@ -1819,10 +1819,7 @@ (define-public libngspice
        (list "--enable-openmp"
              "--enable-ciderlib"
              "--enable-xspice"
-             "--with-ngshared"
-             ;; Readline must be disabled to build KiCad with ngspice 34.  See
-             ;; https://bugs.archlinux.org/task/70563 for reference.
-             "--with-readline=no")))
+             "--with-ngshared")))
     (native-inputs
      (list bison flex))
     (inputs