Properly check valgrind arches

Signed-off-by: David Abdurachmanov <davidlt@rivosinc.com>

fabtests.spec

@@ -1,6 +1,6 @@
 Name:           fabtests
 Version:        1.18.0
-Release:        %autorelease
+Release:        %autorelease -e 0.riscv64
 Summary:        Test suite for libfabric API
 # include/jsmn.h and common/jsmn.c are licensed under MIT.
 # All other source files permit distribution under BSD. Some of them
@@ -11,7 +11,9 @@ Url:            https://github.com/ofiwg/libfabric
 Source:         https://github.com/ofiwg/libfabric/releases/download/v%{version}/%{name}-%{version}.tar.bz2
 Patch0:         0001-adjust-shebang-lines-in-rft_yaml_to_junit_xml-and-ru.patch
 BuildRequires:  libfabric-devel >= %{version}
+%ifarch %{valgrind_arches}
 BuildRequires:  valgrind-devel
+%endif
 BuildRequires:  gcc
 BuildRequires:  make
 Requires:       python3-pytest