[LyX/master] Set high compression level for xz distribution, now really.

[Pavel Sanda]

commit 7bdaa2feb60c3ab6330ccdc1c1f08263a7abede6
Author: Pavel Sanda <sa...@lyx.org>
Date:   Wed Jul 24 23:58:42 2019 +0200

    Set high compression level for xz distribution, now really.
    
    tar:        117 585 920
    xz:          17 394 696
    xz-9:        16 571 524
    xz-9e:       16 271 632
    (xz 5.2.4)
---
 Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/Makefile.am b/Makefile.am
index db22e7d..bfccb79 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -24,7 +24,7 @@ EXTRA_DIST = ANNOUNCE INSTALL.autoconf RELEASE-NOTES 
UPGRADING \
 man_MANS = lyx.1
 
 # Set high compression level for xz distribution
-XZ_OPT=-9ev
+export XZ_OPT=-9ev
 
 rpmdist: dist
        $(LN_S) $(srcdir)/lib/images/lyx.png . ; \