add ldconfig install scripts to ghc_lib_subpackage

ghc-rpm-macros.spec

@@ -167,6 +167,7 @@ EOF
 - dynlibs in _libdir
 - drop ghc_without_shared
 - ghc_fix_rpath removes RPATHs for 8.2+
+- add ldconfig install scripts to ghc_lib_subpackage
 
 * Mon Dec  4 2017 Jens Petersen <petersen@fedoraproject.org> - 1.6.51-1
 - add ghc_set_cflags macro

macros.ghc-extra

@@ -45,6 +45,10 @@ Requires:       %{ghc_prefix}-%{pkgname}%{?_isa} = %{pkgver}-%{release}\
 %description -n %{basepkg}-devel\
 This package provides the Haskell %{pkgname} library development files.\
 \
+%post -n %{basepkg} -p /sbin/ldconfig\
+\
+%postun -n %{basepkg} -p /sbin/ldconfig\
+\
 %post -n %{basepkg}-devel\
 %ghc_pkg_recache\
 \