configure: allow overriding ranlib

Reviewed-by: Timothy Gu <timothygu99@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

configure

@@ -285,6 +285,7 @@ Toolchain options:
   --ld=LD                  use linker LD [$ld_default]
   --pkg-config=PKGCONF     use pkg-config PKGCONF [$pkg_config_default]
   --pkg-config-flags=FLAGS pass additional flags to pkgconf []
+  --ranlib=RANLIB          use ranlib RANLIB [$ranlib_default]
   --host-cc=HOSTCC         use host C compiler HOSTCC
   --host-cflags=HCFLAGS    use HCFLAGS when compiling for host
   --host-cppflags=HCPPFLAGS use HCPPFLAGS when compiling for host
@@ -1866,6 +1867,7 @@ CMDLINE_SET="
     pkg_config_flags
     progs_suffix
     random_seed
+    ranlib
     samples
     strip
     sysinclude
@@ -2580,7 +2582,7 @@ ln_s="ln -s -f"
 nm_default="nm -g"
 objformat="elf"
 pkg_config_default=pkg-config
-ranlib="ranlib"
+ranlib_default="ranlib"
 strip_default="strip"
 yasmexe_default="yasm"
 windres_default="windres"
@@ -2856,7 +2858,7 @@ cc_default="${cross_prefix}${cc_default}"
 cxx_default="${cross_prefix}${cxx_default}"
 nm_default="${cross_prefix}${nm_default}"
 pkg_config_default="${cross_prefix}${pkg_config_default}"
-ranlib="${cross_prefix}${ranlib}"
+ranlib_default="${cross_prefix}${ranlib_default}"
 strip_default="${cross_prefix}${strip_default}"
 windres_default="${cross_prefix}${windres_default}"
 
@@ -2947,7 +2949,7 @@ case "$toolchain" in
     ;;
 esac
 
-set_default arch cc cxx pkg_config strip sysinclude target_exec target_os yasmexe
+set_default arch cc cxx pkg_config ranlib strip sysinclude target_exec target_os yasmexe
 enabled cross_compile || host_cc_default=$cc
 set_default host_cc