ghc_bin_build,ghc_lib_build: defining %ghc_debuginfo allows debuginfo

Needed for ghcX.Y which builds hadrian using %ghc_bin_build
which accidently disabled debuginfo as a side-effect,
which lead to ghcX.Y-compiler .build-id file conflicts:

Error: Transaction test error:
  file /usr/lib/.build-id/4e/f85f81abfd9c031a34af8117ab8e14fcbae536 from install of ghc9.4-compiler-9.4.0.20220623-5.fc36.x86_64 conflicts with file from package ghc9.2-compiler-9.2.3-10.fc36.x86_64

due to missing debuginfo data

ghc-rpm-macros.spec

@@ -7,7 +7,7 @@
 %endif
 
 Name:           ghc-rpm-macros
-Version:        2.4.0
+Version:        2.4.1
 Release:        1%{?dist}
 Summary:        RPM macros for building Haskell packages for GHC
 
@@ -183,6 +183,9 @@ EOF
 
 
 %changelog
+* Sun Jul 17 2022 Jens Petersen <petersen@redhat.com> - 2.4.1-1
+- ghc_bin_build,ghc_lib_build: use ghc_debuginfo to enable debuginfo
+
 * Fri Jun 10 2022 Jens Petersen <petersen@redhat.com> - 2.4.0-1
 - change ghc-deps.sh, splitting buildroot path from ghclibdir
   so that the ghc version can be used more precisely

macros.ghc

@@ -149,14 +149,18 @@ done\
 # ghc_bin_build
 %ghc_bin_build\
 %ghc_fix_doc_perms\
+%if %{undefined ghc_debuginfo}\
 %undefine _enable_debug_packages\
+%endif\
 %cabal_configure\
 %cabal build %{?ghc_smp_mflags} %{?cabal_build_options}
 
 # ghc_lib_build_without_haddock [name] [version]
 %ghc_lib_build_without_haddock()\
 %ghc_fix_doc_perms\
+%if %{undefined ghc_debuginfo}\
 %undefine _enable_debug_packages\
+%endif\
 %if 0%{?rhel} && 0%{?rhel} < 8\
 licensedirversion=%{?2:-%2}\
 %endif\