gcc: make sure that /usr/lib exists on target before installing shared libs

On very lite systems the /usr/lib directory might not exist before libstdc++ is
installed. This patch makes sure the directory exists.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>

toolchain/gcc/gcc-uclibc-3.x.mk

@@ -340,6 +340,7 @@ ifeq ($(BR2_GCC_SHARED_LIBGCC),y)
 endif
 ifeq ($(BR2_INSTALL_LIBSTDCPP),y)
 ifeq ($(BR2_GCC_SHARED_LIBGCC),y)
+	mkdir -p $(TARGET_DIR)/usr/lib
 	-cp -dpf $(STAGING_DIR)/lib/libstdc++.so* $(TARGET_DIR)/usr/lib/
 	-$(STRIPCMD) $(STRIP_STRIP_UNNEEDED) $(TARGET_DIR)/usr/lib/libstdc++.so*
 endif

toolchain/gcc/gcc-uclibc-4.x.mk

@@ -369,6 +369,7 @@ ifeq ($(BR2_GCC_SHARED_LIBGCC),y)
 endif
 ifeq ($(BR2_INSTALL_LIBSTDCPP),y)
 ifeq ($(BR2_GCC_SHARED_LIBGCC),y)
+	mkdir -p $(TARGET_DIR)/usr/lib
 	-cp -dpf $(STAGING_DIR)/usr/$(REAL_GNU_TARGET_NAME)/lib/libstdc++.so* \
 		$(TARGET_DIR)/usr/lib/
 	-$(STRIPCMD) $(STRIP_STRIP_UNNEEDED) $(TARGET_DIR)/usr/lib/libstdc++.so*