Fix minor bug in QuoteGeneration sample Makefile

Update environment variable

---------

Signed-off-by: Sankaranarayanan Venkatasubramanian <sankaranarayanan.venkatasubramanian@intel.com>

Author: svenkata9

SampleCode/QuoteGenerationSample/Makefile

@@ -1,32 +1,7 @@
 #
-# Copyright (C) 2011-2021 Intel Corporation. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions
-# are met:
-#
-#   * Redistributions of source code must retain the above copyright
-#     notice, this list of conditions and the following disclaimer.
-#   * Redistributions in binary form must reproduce the above copyright
-#     notice, this list of conditions and the following disclaimer in
-#     the documentation and/or other materials provided with the
-#     distribution.
-#   * Neither the name of Intel Corporation nor the names of its
-#     contributors may be used to endorse or promote products derived
-#     from this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+# Copyright(c) 2011-2026 Intel Corporation
 #
+# SPDX-License-Identifier: BSD-3-Clause
 #
 
 ######## SGX SDK Settings ########
@@ -92,7 +67,7 @@ ifeq ($(filter $(SGX_QPL_LOGGING),0 1 2),)
 endif
 
 ifneq ($(SGX_QPL_LOGGING), 0)
-ifeq ($(DCAP_BUILD_LIB_DIR),)
+ifeq ($(DCAP_LINUX_BUILD_DIR),)
 App_Link_Flags += -L$(SGX_LIBRARY_PATH) -ldcap_quoteprov
 else
 App_Link_Flags += -L$(DCAP_LINUX_BUILD_DIR) -ldcap_quoteprov