Do not attempt to link against libanl on musl.

Bug: https://bugs.gentoo.org/929907
Bug: https://github.com/falcosecurity/libs/issues/1948

Signed-off-by: Holger Hoffstätte <holger@applied-asynchrony.com>

--- libs-0.17.2/userspace/libsinsp/CMakeLists.txt~	2024-06-14 11:38:50.000000000 +0200
+++ libs-0.17.2/userspace/libsinsp/CMakeLists.txt	2024-07-05 00:18:03.326406540 +0200
@@ -258,8 +258,8 @@ if(NOT WIN32)
 			)
 
 			if(NOT MUSL_OPTIMIZED_BUILD)
-				target_link_libraries(sinsp INTERFACE rt anl)
-				list(APPEND SINSP_PKGCONFIG_LIBRARIES rt anl)
+				target_link_libraries(sinsp INTERFACE rt)
+				list(APPEND SINSP_PKGCONFIG_LIBRARIES rt)
 			endif()
 
 		else()