Please backport 614c7d03877fd99c2de47429b15be3f00306a3bd (LLVM_LIT_ARGS override) to 13.x

[llvmbot]

Bugzilla Link	51423
Resolution	FIXED
Resolved on	Oct 11, 2021 20:29
Version	unspecified
OS	Linux
Blocks	#51489
Reporter	LLVM Bugzilla Contributor
CC	@JDevlieghere,@tstellar
Fixed by commit(s)	614c7d0 8c1ca94

Extended Description

commit 614c7d0
Author: Michał Górny mgorny@moritz.systems
Date: 2021-08-07 22:06:20 +0200

[lldb] [cmake] Add LLVM_LIT_ARGS override support for standalone builds

Add a LLVM_LIT_ARGS cached variable in order to make it possible
to override lit arguments when doing standalone builds.  Without that,
the user variable is ignored and the default options are always used.

Based on a similar solution found in clang.

Differential Revision: https://reviews.llvm.org/D107700

[tstellar]

Merged: 8c1ca94

[tstellar]

mentioned in issue #51489