gnu: clamav: End snippet in truth.

* gnu/packages/antivirus.scm (clamav)[source]: Return #t from snippet.

gnu/packages/antivirus.scm

@@ -59,7 +59,8 @@ (define-public clamav
                             '("win32"                  ; unnecessary
                               "libclamav/c++/llvm"     ; use system llvm
                               "libclamav/tomsfastmath" ; use system tomsfastmath
-                              "libclamunrar"))))       ; non-free license
+                              "libclamunrar"))         ; non-free license
+                  #t))
               (patches
                (search-patches "clamav-system-tomsfastmath.patch"
                                "clamav-config-llvm-libs.patch"))))