[PR PATCH] environment/configure/gnu-configure-args.sh: do not expand exec_prefix

[Johnnynator <Johnnynator@users.noreply.github.com>]

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There is a new pull request by Johnnynator against master on the void-packages repository

https://github.com/Johnnynator/void-packages gnu-conf
https://github.com/void-linux/void-packages/pull/28531

environment/configure/gnu-configure-args.sh: do not expand exec_prefix
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#### General
- [ ] This is a new package and it conforms to the [quality requirements](https://github.com/void-linux/void-packages/blob/master/Manual.md#quality-requirements)

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- [ ] I use the packages affected by the proposed changes on a regular basis and confirm this PR works for me
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A patch file from https://github.com/void-linux/void-packages/pull/28531.patch is attached

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From 117475f6e9163bd57047e1517db371adc0c8de07 Mon Sep 17 00:00:00 2001
From: John <me@johnnynator.dev>
Date: Fri, 5 Feb 2021 20:22:52 +0100
Subject: [PATCH] environment/configure/gnu-configure-args.sh: do not expand
 exec_prefix

the expansion did at least result in invalid pkgconfig
and cmake files generated in xapian-core
---
 common/environment/configure/gnu-configure-args.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/common/environment/configure/gnu-configure-args.sh b/common/environment/configure/gnu-configure-args.sh
index c0a2f4602b9..dafbf5dc110 100644
--- a/common/environment/configure/gnu-configure-args.sh
+++ b/common/environment/configure/gnu-configure-args.sh
@@ -17,7 +17,7 @@ export configure_args+=" --host=$XBPS_TRIPLET --build=$XBPS_TRIPLET"
 # Always use wordsize-specific libdir even though the real path is lib
 # This is to make sure 32-bit and 64-bit libs can coexist when looking
 # up things (the opposite-libdir is always symlinked as libNN)
-export configure_args+=" --libdir=/usr/lib${XBPS_TARGET_WORDSIZE}"
+export configure_args+=" --libdir=\${exec_prefix}/lib${XBPS_TARGET_WORDSIZE}"
 
 _AUTOCONFCACHEDIR=${XBPS_COMMONDIR}/environment/configure/autoconf_cache