Fix plaform glob in FPTOOLS_SET_C_LD_FLAGS

A normal triple may look like

x86_64-unknown-linux

but when cross-compiling you get $target set to a quad such as..

aarch64-unknown-linux-gnu

Which should also match this check.

m4/fptools_set_c_ld_flags.m4

@@ -19,7 +19,7 @@ AC_DEFUN([FPTOOLS_SET_C_LD_FLAGS],
 
     # See Note [ELF needed shared libs]
     case $$1 in
-    *-linux|*-freebsd*)
+    *-linux*|*-freebsd*)
         FP_LINK_SUPPORTS_NO_AS_NEEDED([$3])
         ;;
     esac