Backport upstream RISC-V support.

This is a trivial backport of an upstream patch:

12f000d5b7

cmake-3.6.1-riscv.patch

@@ -0,0 +1,15 @@
+diff -ur cmake-3.6.1.old/Utilities/KWIML/include/kwiml/abi.h cmake-3.6.1.riscv/Utilities/KWIML/include/kwiml/abi.h
+--- cmake-3.6.1.old/Utilities/KWIML/include/kwiml/abi.h	2016-07-22 14:50:23.000000000 +0100
++++ cmake-3.6.1.riscv/Utilities/KWIML/include/kwiml/abi.h	2016-09-07 17:59:15.929447366 +0100
+@@ -467,6 +467,10 @@
+ #elif defined(__XTENSA_EL__)
+ # define KWIML_ABI_ENDIAN_ID KWIML_ABI_ENDIAN_ID_LITTLE
+ 
++/* RISC-V */
++#elif defined(__riscv__)
++# define KWIML_ABI_ENDIAN_ID KWIML_ABI_ENDIAN_ID_LITTLE
++
+ /* Unknown CPU */
+ #elif !defined(KWIML_ABI_NO_ERROR_ENDIAN)
+ # error "Byte order of target CPU unknown."
+Only in cmake-3.6.1.riscv/Utilities/KWIML/include/kwiml: abi.h~

cmake.spec

@@ -67,6 +67,10 @@ Patch2:         %{name}-findruby.patch
 # replace release flag -O3 with -O2 for fedora
 Patch3:         %{name}-fedora-flag_release.patch
 
+# Upstream patch which adds RISC-V support.
+# https://gitlab.kitware.com/utils/kwiml/commit/12f000d5b7b4c8394b16282da50126bccd4d4819
+Patch5:         %{name}-3.6.1-riscv.patch
+
 # Patch for renaming on EPEL
 %if 0%{?name_suffix:1}
 Patch1000:      %{name}-rename.patch
@@ -177,6 +181,7 @@ The %{name}-gui package contains the Qt based GUI for %{name}.
 # We cannot use backups with patches to Modules as they end up being installed
 %patch2 -p1
 %patch3 -p1
+%patch5 -p1
 
 %if %{with python3}
 echo '#!%{__python3}' > %{name}.prov