disable for musl

package/gdbserver/Makefile

@@ -10,6 +10,7 @@ PKG_SECTION:=		debug
 PKG_DEPENDS:=		libthread-db
 
 PKG_ARCH_DEPENDS:=	!avr32 !m68k
+PKG_LIBC_DEPENDS:=	uclibc eglibc glibc
 PKG_SUBPKGS:=		GDBSERVER
 
 WRKSRC=                 ${WRKDIST}/gdb/gdbserver