Mesa (master): docs: update envvars.html to reflect having a cache per arch

[Timothy Arceri]

Module: Mesa
Branch: master
Commit: ee8d2e280445b3f732e010bc6e2507483213a51a
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=ee8d2e280445b3f732e010bc6e2507483213a51a

Author: Timothy Arceri <tarceri at itsqueeze.com>
Date:   Thu Mar  2 17:08:34 2017 +1100

docs: update envvars.html to reflect having a cache per arch

---

 docs/envvars.html | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/docs/envvars.html b/docs/envvars.html
index 9f1f708..aa56cd1 100644
--- a/docs/envvars.html
+++ b/docs/envvars.html
@@ -119,7 +119,10 @@ if it's higher than what's normally reported. (for developers only)
 the on-disk cache of compiled GLSL programs. Should be set to a number
 optionally followed by 'K', 'M', or 'G' to specify a size in
 kilobytes, megabytes, or gigabytes. By default, gigabytes will be
-assumed. And if unset, a maximum size of 1GB will be used.
+assumed. And if unset, a maximum size of 1GB will be used. Note: A separate
+cache might be created for each architecture that Mesa is installed for on
+your system. For example under the default settings you may end up with a 1GB
+cache for x86_64 and another 1GB cache for i386.
 <li>MESA_GLSL_CACHE_DIR - if set, determines the directory to be used
 for the on-disk cache of compiled GLSL programs. If this variable is
 not set, then the cache will be stored in $XDG_CACHE_HOME/mesa (if