tools/ccache: find libzstd using rpath

Previously, ccache would end up using the system libzstd, which is not
supposed to be a build requirement.

Signed-off-by: Thomas Nixon <[email protected]>

tools/ccache/Makefile

@@ -21,7 +21,10 @@ include $(INCLUDE_DIR)/cmake.mk
 
 CMAKE_HOST_OPTIONS += \
 	-DCMAKE_C_COMPILER_LAUNCHER="" \
-	-DCMAKE_CXX_COMPILER_LAUNCHER=""
+	-DCMAKE_CXX_COMPILER_LAUNCHER="" \
+	-DCMAKE_SKIP_RPATH=FALSE \
+	-DCMAKE_INSTALL_RPATH="${STAGING_DIR_HOST}/lib" \
+
 
 define Host/Install/ccache
 	$(INSTALL_DIR) $(STAGING_DIR_HOST)/bin/