package/uclibc: also install utils to STAGING_DIR

When BR2_UCLIBC_INSTALL_UTILS is enabled, utils such as getconf, ldd,
locale get installed to TARGET_DIR. However, they do not get installed
to STAGING_DIR, which is annoying as it means that they are not part
of external toolchains built by Buildroot.

This commit adjusts the uclibc package to make sure those tools also
get installed to STAGING_DIR.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/uclibc/uclibc.mk

@@ -449,6 +449,14 @@ define UCLIBC_INSTALL_UTILS_TARGET
 		PREFIX=$(TARGET_DIR) \
 		utils install_utils
 endef
+
+define UCLIBC_INSTALL_UTILS_STAGING
+	$(MAKE1) -C $(@D) \
+		CC="$(TARGET_CC)" CPP="$(TARGET_CPP)" LD="$(TARGET_LD)" \
+		ARCH="$(UCLIBC_TARGET_ARCH)" \
+		PREFIX=$(STAGING_DIR) \
+		utils install_utils
+endef
 endif
 
 define UCLIBC_INSTALL_TARGET_CMDS
@@ -479,6 +487,7 @@ define UCLIBC_INSTALL_STAGING_CMDS
 		RUNTIME_PREFIX=/ \
 		install_runtime install_dev
 	$(UCLIBC_INSTALL_HOST_UTILS)
+	$(UCLIBC_INSTALL_UTILS_STAGING)
 endef
 
 # Checks to give errors that the user can understand