Try another technique for unversioned Python avoidance

mono-core.spec

@@ -36,6 +36,7 @@ Group:          Development/Languages/Mono
 Url:            http://www.mono-project.com
 Source0:        http://download.mono-project.com/sources/mono/mono-%{version}.tar.bz2
 Patch0:		llvm_llc_opt_default_path.patch
+Patch1:		use_python3_not_unversioned_for_genmdesc.patch
 BuildRequires:  autoconf
 BuildRequires:  automake
 BuildRequires:  bison
@@ -44,9 +45,6 @@ BuildRequires:  cmake
 BuildRequires:  gettext
 BuildRequires:  fdupes
 BuildRequires:  gcc-c++
-%if 0%{?rhel} >= 8
-BuildRequires:  python-unversioned-command
-%endif
 %if 0%{?rhel} < 7
 BuildRequires:  devtoolset-2-toolchain
 %endif
@@ -140,6 +138,9 @@ technologies that have been submitted to the ECMA for standardization.
 %prep
 %setup -q -n mono-%{version}
 %patch0 -p1
+%if 0%{?rhel} >= 8
+%patch1 -p1
+%endif
 
 %build
 %{?scl:scl enable %{scl} - << \EOF}

use_python3_not_unversioned_for_genmdesc.patch

@@ -0,0 +1,13 @@
+diff --git a/mono/mini/Makefile.am.in b/mono/mini/Makefile.am.in
+index 65399906806..4538c5ba428 100755
+--- a/mono/mini/Makefile.am.in
++++ b/mono/mini/Makefile.am.in
+@@ -775,7 +775,7 @@ MemoryIntrinsics.dll: MemoryIntrinsics.il
+ 
+ GENMDESC_OPTS=
+ 
+-GENMDESC_PRG=python $(srcdir)/genmdesc.py $(target_define) $(srcdir)
++GENMDESC_PRG=python3 $(srcdir)/genmdesc.py $(target_define) $(srcdir)
+ 
+ cpu-wasm.h: mini-ops.h cpu-wasm.md
+ 	$(GENMDESC_PRG) cpu-wasm.h wasm_desc $(srcdir)/cpu-wasm.md