hfsprogs: Fix build failures with external toolchains

Several problems were found with building against an external toolchain:

* TARGET_CPPFLAGS was missing which would prevent finding the headers
* TARGET_LDFLAGS also was not passed correctly
* when building against glibc, since we use strlcpy() we need to link
  against libbsd

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

utils/hfsprogs/Makefile

@@ -29,7 +29,7 @@ define Package/hfsprogs/Default
   SECTION:=utils
   CATEGORY:=Utilities
   SUBMENU:=Filesystem
-  DEPENDS:=+libopenssl
+  DEPENDS:=+libopenssl +USE_GLIBC:libbsd
 endef
 
 define Package/hfsfsck
@@ -59,7 +59,8 @@ define Build/Compile
 	$(MAKE) -C $(PKG_BUILD_DIR) \
 		-f Makefile.lnx \
 		$(TARGET_CONFIGURE_OPTS) \
-		CFLAGS+="$(TARGET_CFLAGS) -I$(PKG_BUILD_DIR)/include -DDEBUG_BUILD=0 -D_FILE_OFFSET_BITS=64 -D LINUX=1 -D BSD=1" \
+		CFLAGS+="$(TARGET_CFLAGS) $(TARGET_CPPFLAGS) -I$(PKG_BUILD_DIR)/include -DDEBUG_BUILD=0 -D_FILE_OFFSET_BITS=64 -D LINUX=1 -D BSD=1" \
+		LDFLAGS+="$(TARGET_LDFLAGS) -lbsd" \
 		all
 endef