Build RPM with ETC_GITCONFIG=/etc/gitconfig

Signed-off-by: Junio C Hamano <junkio@cox.net>

git.spec.in

@@ -86,12 +86,14 @@ Perl interface to Git
 
 %build
 make %{_smp_mflags} CFLAGS="$RPM_OPT_FLAGS" WITH_OWN_SUBPROCESS_PY=YesPlease \
+     ETC_GITCONFIG=/etc/gitconfig \
      prefix=%{_prefix} all %{!?_without_docs: doc}
 
 %install
 rm -rf $RPM_BUILD_ROOT
 make %{_smp_mflags} CFLAGS="$RPM_OPT_FLAGS" DESTDIR=$RPM_BUILD_ROOT \
      WITH_OWN_SUBPROCESS_PY=YesPlease \
+     ETC_GITCONFIG=/etc/gitconfig \
      prefix=%{_prefix} mandir=%{_mandir} INSTALLDIRS=vendor \
      install %{!?_without_docs: install-doc}
 find $RPM_BUILD_ROOT -type f -name .packlist -exec rm -f {} ';'