[source] tools/coreutils: install readlink

[LEDE Commits]

jow pushed a commit to source.git, branch lede-17.01:
https://git.lede-project.org/dde29b2b01e489184882fe718c4a3b9ffcfc3aac

commit dde29b2b01e489184882fe718c4a3b9ffcfc3aac
Author: Felix Fietkau <nbd at nbd.name>
AuthorDate: Thu Nov 9 12:21:15 2017 +0100

    tools/coreutils: install readlink
    
    Parts of the build system use non-portable invocation of readlink
    
    Signed-off-by: Felix Fietkau <nbd at nbd.name>
    (cherry picked from commit 6bcc1c5331c797004e1b43168eb116d2d14b0102)
---
 tools/coreutils/Makefile | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/coreutils/Makefile b/tools/coreutils/Makefile
index 1acdfb9..c731eaf 100644
--- a/tools/coreutils/Makefile
+++ b/tools/coreutils/Makefile
@@ -15,14 +15,14 @@ PKG_HASH:=8891d349ee87b9ff7870f52b6d9312a9db672d2439d289bc57084771ca21656b
 
 HOST_BUILD_PARALLEL := 1
 
-BUILD_PROGRAMS = date
+BUILD_PROGRAMS = date readlink
 
 include $(INCLUDE_DIR)/host-build.mk
 
 BUILD_BINS = $(patsubst %,src/%,$(BUILD_PROGRAMS))
 
 HOST_CONFIGURE_ARGS += \
-	 --enable-install-program=date
+	 --enable-install-program=$(subst $(space),$(comma),$(strip $(BUILD_PROGRAMS)))
 
 HOST_MAKE_FLAGS += \
 	PROGRAMS="$(BUILD_BINS)" \