SWDEV-476075 - Prevent the modification of interpreter directives

CPACK is converting /usr/bin/env python3 to /usr/libexec/platform-python in RHEL8.
Undefining __brp_mangle_shebangs will prevent the same

Change-Id: Id285e2cea1de583853cec17eccf0a3a794cca643

CMakeLists.txt

@@ -343,6 +343,9 @@ if(CPACK_RPM_PACKAGE_RELEASE)
   set(CPACK_RPM_PACKAGE_RELEASE_DIST ON)
 endif()
 
+# Cpack converts !/usr/bin/env python3 to /usr/libexec/platform-python in RHEL8.
+# prevent the BRP(buildroot policy) script from checking and modifying interpreter directives
+set(CPACK_RPM_SPEC_MORE_DEFINE "%undefine __brp_mangle_shebangs")
 
 # The line below doesn't currently work; it may be this issue:
 # https://bugzilla.redhat.com/show_bug.cgi?id=1811358