Add support for RISC-V (riscv64)

Signed-off-by: David Abdurachmanov <david.abdurachmanov@sifive.com>

clang.spec

@@ -64,7 +64,7 @@
 
 Name:		%pkg_name
 Version:	%{maj_ver}.%{min_ver}.%{patch_ver}
-Release:	%{baserelease}%{?rc_ver:.rc%{rc_ver}}%{?dist}
+Release:	%{baserelease}%{?rc_ver:.rc%{rc_ver}}.0.riscv64%{?dist}
 Summary:	A C language family front-end for LLVM
 
 License:	NCSA
@@ -242,7 +242,7 @@ sed -i 's/\@FEDORA_LLVM_LIB_SUFFIX\@//g' test/lit.cfg.py
 mkdir -p _build
 cd _build
 
-%ifarch s390 s390x %{arm} %ix86
+%ifarch s390 s390x %{arm} %ix86 riscv64
 # Decrease debuginfo verbosity to reduce memory consumption during final library linking
 %global optflags %(echo %{optflags} | sed 's/-g /-g1 /')
 %endif
@@ -354,7 +354,7 @@ chmod u-x %{buildroot}%{_mandir}/man1/scan-build.1*
 # requires lit.py from LLVM utilities
 # FIXME: Fix failing ARM tests, s390x i686 and ppc64le tests
 LD_LIBRARY_PATH=%{buildroot}%{_libdir} ninja check-all -C _build || \
-%ifarch s390x i686 ppc64le %{arm}
+%ifarch s390x i686 ppc64le %{arm} riscv64
 :
 %else
 false
@@ -431,6 +431,9 @@ false
 
 %endif
 %changelog
+* Sat Aug 24 2019 David Abdurachmanov <david.abdurachmanov@sifive.com> - 9.0.0-0.1.rc2.0.riscv64
+- Add support for RISC-V (riscv64)
+
 * Thu Aug 22 2019 Tom Stellard <tstellar@redhat.com> - 9.0.0-0.1.rc2
 - 9.0.0 Release candidate 2