[test-suite] ClamAV CMake fix.

CMake needs help finding gettext libintl libraries in environments with non-standard GCC installs.

Reviewed By: Meinersbur

Differential Revision: https://reviews.llvm.org/D93136
diff --git a/MultiSource/Applications/ClamAV/CMakeLists.txt b/MultiSource/Applications/ClamAV/CMakeLists.txt
index 7fb3bd5..849b773 100644
--- a/MultiSource/Applications/ClamAV/CMakeLists.txt
+++ b/MultiSource/Applications/ClamAV/CMakeLists.txt
@@ -170,4 +170,6 @@
   zlib_uncompr.c
   zlib_zutil.c
 )
+find_package(Intl REQUIRED)
+target_link_libraries(clamscan ${Intl_LIBRARIES})
 llvm_test_data(clamscan ${INPUT} dbdir)