!34 add riscv64 support

From: @Jingwiw 
Reviewed-by: @leeffo 
Signed-off-by: @leeffo

libjpeg-turbo.spec

@@ -1,6 +1,6 @@
 Name:           libjpeg-turbo
 Version:        2.1.1
-Release:        5
+Release:        6
 Summary:        MMX/SSE2/SIMD accelerated libjpeg-compatible JPEG codec library
 License:        IJG
 URL:            http://sourceforge.net/projects/libjpeg-turbo
@@ -63,7 +63,11 @@ manipulate JPEG files using the TurboJPEG library.
 %autosetup -n %{name}-%{version} -p1
 
 %build
-%{cmake} -DCMAKE_INSTALL_LIBDIR=%{_libdir} -DCMAKE_SKIP_RPATH:BOOL=YES -DCMAKE_SKIP_INSTALL_RPATH:BOOL=YES -DENABLE_STATIC:BOOL=NO .
+%{cmake} -DCMAKE_INSTALL_LIBDIR=%{_libdir} -DCMAKE_SKIP_RPATH:BOOL=YES -DCMAKE_SKIP_INSTALL_RPATH:BOOL=YES -DENABLE_STATIC:BOOL=NO . \
+%ifarch riscv64
+    -DFLOATTEST=fp-contract \
+%endif
+    %{nil}
 
 %make_build V=1
 
@@ -145,6 +149,9 @@ LD_LIBRARY_PATH=%{buildroot}%{_libdir} make test %{?_smp_mflags}
 %{_mandir}/man1/*.1*
 
 %changelog
+* Mon Jul 10 2023 Jingwiw  <wangjingwei@iscas.ac.cn> - 2.1.1-6
+- add riscv64 support
+
 * Mon Apr 24 2023 guoqinglan <guoqinglan@kylinsec.com.cn> - 2.1.1-5
 - fix build error for sw_64