[source] toolchain: add musl libc.so to external toolchain

[LEDE Commits]

jow pushed a commit to source.git, branch lede-17.01:
https://git.lede-project.org/950439234e7f0b2ad7879abe45adfc556f2ed08c

commit 950439234e7f0b2ad7879abe45adfc556f2ed08c
Author: Hauke Mehrtens <hauke.mehrtens at intel.com>
AuthorDate: Tue Mar 14 19:18:57 2017 +0100

    toolchain: add musl libc.so to external toolchain
    
    musl provides a /lib/libc.so file which should be integrated into the libc
    package when the external toolchain with musl is used.
    
    Signed-off-by: Hauke Mehrtens <hauke.mehrtens at intel.com>
    Reviewed-by: Florian Fainelli <f.fainelli at gmail.com>
    Acked-by: Jo-Philipp Wich <jo at mein.io>
    (cherry picked from commit b6a8b43dd2771d4d237256417218bed862545ef4)
---
 package/libs/toolchain/Makefile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package/libs/toolchain/Makefile b/package/libs/toolchain/Makefile
index 88adb9a..58bd06c 100644
--- a/package/libs/toolchain/Makefile
+++ b/package/libs/toolchain/Makefile
@@ -164,7 +164,7 @@ define Package/libc/config
 		string
 		prompt "libc shared library files (use wildcards)"
 		depends on EXTERNAL_TOOLCHAIN && PACKAGE_libc
-		default "./lib/ld{*.so*,-linux*.so.*} ./lib/lib{anl,c,cidn,crypt,dl,m,nsl,nss_dns,nss_files,resolv,util}{-*.so,.so.*}"
+		default "./lib/ld{*.so*,-linux*.so.*} ./lib/lib{anl,c,cidn,crypt,dl,m,nsl,nss_dns,nss_files,resolv,util}{-*.so,.so.*,.so}"
 
 	endmenu
 endef